77777340670670 has 64 divisors (see below), whose sum is σ = 149435257060800. Its totient is φ = 29044637644800.

The previous prime is 77777340670643. The next prime is 77777340670717. The reversal of 77777340670670 is 7607604377777.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77777340670670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6758645 + ... + 14185695.

It is an arithmetic number, because the mean of its divisors is an integer number (2334925891575).

Almost surely, 2^{77777340670670} is an apocalyptic number.

77777340670670 is a deficient number, since it is larger than the sum of its proper divisors (71657916390130).

77777340670670 is a wasteful number, since it uses less digits than its factorization.

77777340670670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427573.

The product of its (nonzero) digits is 355770576, while the sum is 68.

The spelling of 77777340670670 in words is "seventy-seven trillion, seven hundred seventy-seven billion, three hundred forty million, six hundred seventy thousand, six hundred seventy".