74999664 has 120 divisors (see below), whose sum is σ = 221450112. Its totient is φ = 23662080.

The previous prime is 74999663. The next prime is 74999681. The reversal of 74999664 is 46699947.

74999664 is a `hidden beast` number, since 7 + 499 + 96 + 64 = 666.

It is a super-2 number, since 2×74999664² = 11249899200225792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74999664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74999663) 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 23 ways as a sum of consecutive naturals, for example, 236434 + ... + 236750.

Almost surely, 2^74999664 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 74999664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110725056).

74999664 is an abundant number, since it is smaller than the sum of its proper divisors (146450448).

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

74999664 is a wasteful number, since it uses less digits than its factorization.

74999664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 406 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 74999664 is about 8660.2346388536. The cubic root of 74999664 is about 421.7157028869.

The spelling of 74999664 in words is "seventy-four million, nine hundred ninety-nine thousand, six hundred sixty-four".