77708470777 has 16 divisors (see below), whose sum is σ = 92364798592. Its totient is φ = 63991710720.

The previous prime is 77708470759. The next prime is 77708470781. The reversal of 77708470777 is 77707480777.

It is not a de Polignac number, because 77708470777 - 2⁷ = 77708470649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77708470577) by changing a digit.

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, 2097768 + ... + 2134489.

It is an arithmetic number, because the mean of its divisors is an integer number (5772799912).

Almost surely, 2^77708470777 is an apocalyptic number.

It is an amenable number.

77708470777 is a deficient number, since it is larger than the sum of its proper divisors (14656327815).

77708470777 is a wasteful number, since it uses less digits than its factorization.

77708470777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232368.

The product of its (nonzero) digits is 26353376, while the sum is 61.

The spelling of 77708470777 in words is "seventy-seven billion, seven hundred eight million, four hundred seventy thousand, seven hundred seventy-seven".