61099668 has 108 divisors (see below), whose sum is σ = 189221760. Its totient is φ = 16529184.

The previous prime is 61099663. The next prime is 61099669. The reversal of 61099668 is 86699016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61099663) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32605 + ... + 34427.

Almost surely, 2^61099668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61099668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94610880).

61099668 is an abundant number, since it is smaller than the sum of its proper divisors (128122092).

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

61099668 is a wasteful number, since it uses less digits than its factorization.

61099668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 61099668 is about 7816.6276615942. The cubic root of 61099668 is about 393.8639966227.

The spelling of 61099668 in words is "sixty-one million, ninety-nine thousand, six hundred sixty-eight".