74347921660 has 48 divisors (see below), whose sum is σ = 157425508800. Its totient is φ = 29493155840.

The previous prime is 74347921603. The next prime is 74347921733. The reversal of 74347921660 is 6612974347.

It is a super-2 number, since 2×74347921660² (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 15 ways as a sum of consecutive naturals, for example, 1908780 + ... + 1947340.

It is an arithmetic number, because the mean of its divisors is an integer number (3279698100).

Almost surely, 2^74347921660 is an apocalyptic number.

It is an amenable number.

74347921660 is an abundant number, since it is smaller than the sum of its proper divisors (83077587140).

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

74347921660 is a wasteful number, since it uses less digits than its factorization.

74347921660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39366 (or 39364 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 74347921660 in words is "seventy-four billion, three hundred forty-seven million, nine hundred twenty-one thousand, six hundred sixty".