77777122077 has 16 divisors (see below), whose sum is σ = 115487856000. Its totient is φ = 51733294272.

The previous prime is 77777121979. The next prime is 77777122091. The reversal of 77777122077 is 77022177777.

It is not a de Polignac number, because 77777122077 - 2²⁷ = 77642904349 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77777122177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3269052 + ... + 3292757.

It is an arithmetic number, because the mean of its divisors is an integer number (7217991000).

Almost surely, 2^77777122077 is an apocalyptic number.

It is an amenable number.

77777122077 is a deficient number, since it is larger than the sum of its proper divisors (37710733923).

77777122077 is a wasteful number, since it uses less digits than its factorization.

77777122077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562257 (or 6562251 counting only the distinct ones).

The product of its (nonzero) digits is 3294172, while the sum is 54.

The spelling of 77777122077 in words is "seventy-seven billion, seven hundred seventy-seven million, one hundred twenty-two thousand, seventy-seven".