766655556667 has 32 divisors (see below), whose sum is σ = 1036172841984. Its totient is φ = 547788528000.

The previous prime is 766655556661. The next prime is 766655556671.

766655556667 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 766655556667 - 2³⁵ = 732295818299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766655556596 and 766655556605.

It is not an unprimeable number, because it can be changed into a prime (766655556661) 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 31 ways as a sum of consecutive naturals, for example, 2384908 + ... + 2687209.

It is an arithmetic number, because the mean of its divisors is an integer number (32380401312).

Almost surely, 2^766655556667 is an apocalyptic number.

766655556667 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

766655556667 is a deficient number, since it is larger than the sum of its proper divisors (269517285317).

766655556667 is a wasteful number, since it uses less digits than its factorization.

766655556667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072299.

The product of its digits is 1428840000, while the sum is 70.

The spelling of 766655556667 in words is "seven hundred sixty-six billion, six hundred fifty-five million, five hundred fifty-six thousand, six hundred sixty-seven".