77666707320 has 32 divisors (see below), whose sum is σ = 233000122320. Its totient is φ = 20711121920.

The previous prime is 77666707301. The next prime is 77666707343. The reversal of 77666707320 is 2370766677.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 323611161 + ... + 323611400.

Almost surely, 2^77666707320 is an apocalyptic number.

It is an amenable number.

77666707320 is an abundant number, since it is smaller than the sum of its proper divisors (155333415000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77666707320 is a wasteful number, since it uses less digits than its factorization.

77666707320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647222575 (or 647222571 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 51.

The spelling of 77666707320 in words is "seventy-seven billion, six hundred sixty-six million, seven hundred seven thousand, three hundred twenty".