77666673328 has 20 divisors (see below), whose sum is σ = 150485880688. Its totient is φ = 38831607360.

The previous prime is 77666673311. The next prime is 77666673373. The reversal of 77666673328 is 82337666677.

It is a super-2 number, since 2×77666673328² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311893 + ... + 502603.

Almost surely, 2^77666673328 is an apocalyptic number.

It is an amenable number.

77666673328 is a deficient number, since it is larger than the sum of its proper divisors (72819207360).

77666673328 is a wasteful number, since it uses less digits than its factorization.

77666673328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216172 (or 216166 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 61.

The spelling of 77666673328 in words is "seventy-seven billion, six hundred sixty-six million, six hundred seventy-three thousand, three hundred twenty-eight".