61776672 has 24 divisors (see below), whose sum is σ = 162164016. Its totient is φ = 20592192.

The previous prime is 61776661. The next prime is 61776679. The reversal of 61776672 is 27667716.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (61776679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321658 + ... + 321849.

It is an arithmetic number, because the mean of its divisors is an integer number (6756834).

Almost surely, 2^61776672 is an apocalyptic number.

It is an amenable number.

61776672 is an abundant number, since it is smaller than the sum of its proper divisors (100387344).

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

61776672 is a wasteful number, since it uses less digits than its factorization.

61776672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643520 (or 643512 counting only the distinct ones).

The product of its digits is 148176, while the sum is 42.

The square root of 61776672 is about 7859.8137382511. The cubic root of 61776672 is about 395.3133698690.

The spelling of 61776672 in words is "sixty-one million, seven hundred seventy-six thousand, six hundred seventy-two".