76664405 has 8 divisors (see below), whose sum is σ = 95997312. Its totient is φ = 58664848.

The previous prime is 76664389. The next prime is 76664437. The reversal of 76664405 is 50446667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76664405 - 2⁴ = 76664389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 333209 + ... + 333438.

It is an arithmetic number, because the mean of its divisors is an integer number (11999664).

Almost surely, 2^76664405 is an apocalyptic number.

It is an amenable number.

76664405 is a deficient number, since it is larger than the sum of its proper divisors (19332907).

76664405 is a wasteful number, since it uses less digits than its factorization.

76664405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666675.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 76664405 is about 8755.8212064889. The cubic root of 76664405 is about 424.8131219916.

The spelling of 76664405 in words is "seventy-six million, six hundred sixty-four thousand, four hundred five".