76664475 has 90 divisors (see below), whose sum is σ = 152005524. Its totient is φ = 38188800.

The previous prime is 76664461. The next prime is 76664479. The reversal of 76664475 is 57446667.

It is a happy number.

It is not a de Polignac number, because 76664475 - 2²⁰ = 75615899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 76664475.

It is not an unprimeable number, because it can be changed into a prime (76664479) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 585160 + ... + 585290.

Almost surely, 2^76664475 is an apocalyptic number.

76664475 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

76664475 is a deficient number, since it is larger than the sum of its proper divisors (75341049).

76664475 is a wasteful number, since it uses less digits than its factorization.

76664475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 156 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 76664475 is about 8755.8252038286. The cubic root of 76664475 is about 424.8132512863.

The spelling of 76664475 in words is "seventy-six million, six hundred sixty-four thousand, four hundred seventy-five".