66677538776 has 16 divisors (see below), whose sum is σ = 126188801640. Its totient is φ = 33027191680.

The previous prime is 66677538769. The next prime is 66677538787. The reversal of 66677538776 is 67783577666.

It is a congruent number.

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, 38946305 + ... + 38948016.

Almost surely, 2^66677538776 is an apocalyptic number.

It is an amenable number.

66677538776 is a deficient number, since it is larger than the sum of its proper divisors (59511262864).

66677538776 is a wasteful number, since it uses less digits than its factorization.

66677538776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77894434 (or 77894430 counting only the distinct ones).

The product of its digits is 373403520, while the sum is 68.

The spelling of 66677538776 in words is "sixty-six billion, six hundred seventy-seven million, five hundred thirty-eight thousand, seven hundred seventy-six".