61700640 has 96 divisors (see below), whose sum is σ = 195664896. Its totient is φ = 16343040.

The previous prime is 61700629. The next prime is 61700647. The reversal of 61700640 is 4600716.

61700640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61700640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61700647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91344 + ... + 92016.

It is an arithmetic number, because the mean of its divisors is an integer number (2038176).

Almost surely, 2^61700640 is an apocalyptic number.

61700640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61700640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97832448).

61700640 is an abundant number, since it is smaller than the sum of its proper divisors (133964256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61700640 is a wasteful number, since it uses less digits than its factorization.

61700640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 61700640 is about 7854.9754932781. The cubic root of 61700640 is about 395.1511252097.

The spelling of 61700640 in words is "sixty-one million, seven hundred thousand, six hundred forty".