76661604 has 36 divisors (see below), whose sum is σ = 198294096. Its totient is φ = 24959088.

The previous prime is 76661603. The next prime is 76661609. The reversal of 76661604 is 40616667.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (76661603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23214 + ... + 26309.

Almost surely, 2^76661604 is an apocalyptic number.

It is an amenable number.

76661604 is an abundant number, since it is smaller than the sum of its proper divisors (121632492).

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

76661604 is a wasteful number, since it uses less digits than its factorization.

76661604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49576 (or 49571 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 76661604 is about 8755.6612542971. The cubic root of 76661604 is about 424.8079482910.

The spelling of 76661604 in words is "seventy-six million, six hundred sixty-one thousand, six hundred four".