77660507231 has 8 divisors (see below), whose sum is σ = 79490346624. Its totient is φ = 75851113240.

The previous prime is 77660507207. The next prime is 77660507291. The reversal of 77660507231 is 13270506677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77660507231 - 2²² = 77656312927 is a prime.

It is a super-2 number, since 2×77660507231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77660507291) 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 7 ways as a sum of consecutive naturals, for example, 5103665 + ... + 5118858.

It is an arithmetic number, because the mean of its divisors is an integer number (9936293328).

Almost surely, 2^77660507231 is an apocalyptic number.

77660507231 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

77660507231 is a deficient number, since it is larger than the sum of its proper divisors (1829839393).

77660507231 is a wasteful number, since it uses less digits than its factorization.

77660507231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222701.

The product of its (nonzero) digits is 370440, while the sum is 44.

The spelling of 77660507231 in words is "seventy-seven billion, six hundred sixty million, five hundred seven thousand, two hundred thirty-one".