77660100560 has 40 divisors (see below), whose sum is σ = 206353982976. Its totient is φ = 26626320000.

The previous prime is 77660100559. The next prime is 77660100563. The reversal of 77660100560 is 6500106677.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77660100563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69338816 + ... + 69339935.

Almost surely, 2^77660100560 is an apocalyptic number.

77660100560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77660100560 is an abundant number, since it is smaller than the sum of its proper divisors (128693882416).

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

77660100560 is a wasteful number, since it uses less digits than its factorization.

77660100560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138678771 (or 138678765 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 77660100560 in words is "seventy-seven billion, six hundred sixty million, one hundred thousand, five hundred sixty".