74881521660 has 96 divisors (see below), whose sum is σ = 228981924864. Its totient is φ = 18133024000.

The previous prime is 74881521653. The next prime is 74881521679. The reversal of 74881521660 is 6612518847.

It is a super-2 number, since 2×74881521660² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538990 + ... + 663530.

It is an arithmetic number, because the mean of its divisors is an integer number (2385228384).

Almost surely, 2^74881521660 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 74881521660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114490962432).

74881521660 is an abundant number, since it is smaller than the sum of its proper divisors (154100403204).

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

74881521660 is a wasteful number, since it uses less digits than its factorization.

74881521660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125475 (or 125473 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 74881521660 in words is "seventy-four billion, eight hundred eighty-one million, five hundred twenty-one thousand, six hundred sixty".