77667966385 has 32 divisors (see below), whose sum is σ = 101302755840. Its totient is φ = 56947857408.

The previous prime is 77667966367. The next prime is 77667966443. The reversal of 77667966385 is 58366976677.

It is a cyclic number.

It is not a de Polignac number, because 77667966385 - 2⁵ = 77667966353 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410974 + ... + 569416.

It is an arithmetic number, because the mean of its divisors is an integer number (3165711120).

Almost surely, 2^77667966385 is an apocalyptic number.

It is an amenable number.

77667966385 is a deficient number, since it is larger than the sum of its proper divisors (23634789455).

77667966385 is a wasteful number, since it uses less digits than its factorization.

77667966385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158617.

The product of its digits is 480090240, while the sum is 70.

The spelling of 77667966385 in words is "seventy-seven billion, six hundred sixty-seven million, nine hundred sixty-six thousand, three hundred eighty-five".