77556022668 has 48 divisors (see below), whose sum is σ = 201092492160. Its totient is φ = 25849266192.

The previous prime is 77556022591. The next prime is 77556022703. The reversal of 77556022668 is 86622065577.

77556022668 is a `hidden beast` number, since 7 + 7 + 5 + 5 + 602 + 26 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 1158355 + ... + 1223477.

It is an arithmetic number, because the mean of its divisors is an integer number (4189426920).

Almost surely, 2^77556022668 is an apocalyptic number.

It is an amenable number.

77556022668 is an abundant number, since it is smaller than the sum of its proper divisors (123536469492).

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

77556022668 is a wasteful number, since it uses less digits than its factorization.

77556022668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76163 (or 76155 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 77556022668 in words is "seventy-seven billion, five hundred fifty-six million, twenty-two thousand, six hundred sixty-eight".