76638866 has 8 divisors (see below), whose sum is σ = 115333680. Its totient is φ = 38194308.

The previous prime is 76638853. The next prime is 76638889. The reversal of 76638866 is 66883667.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 61796 + ... + 63023.

It is an arithmetic number, because the mean of its divisors is an integer number (14416710).

Almost surely, 2^76638866 is an apocalyptic number.

76638866 is a deficient number, since it is larger than the sum of its proper divisors (38694814).

76638866 is a wasteful number, since it uses less digits than its factorization.

76638866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125128.

The product of its digits is 1741824, while the sum is 50.

The square root of 76638866 is about 8754.3626838280. The cubic root of 76638866 is about 424.7659444813.

The spelling of 76638866 in words is "seventy-six million, six hundred thirty-eight thousand, eight hundred sixty-six".