77660105402 has 24 divisors (see below), whose sum is σ = 129197742336. Its totient is φ = 34721322000.

The previous prime is 77660105387. The next prime is 77660105441. The reversal of 77660105402 is 20450106677.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 392474 + ... + 556197.

It is an arithmetic number, because the mean of its divisors is an integer number (5383239264).

Almost surely, 2^77660105402 is an apocalyptic number.

77660105402 is a deficient number, since it is larger than the sum of its proper divisors (51537636934).

77660105402 is a wasteful number, since it uses less digits than its factorization.

77660105402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948806 (or 948745 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 77660105402 in words is "seventy-seven billion, six hundred sixty million, one hundred five thousand, four hundred two".