56676667665 has 16 divisors (see below), whose sum is σ = 90719785728. Its totient is φ = 30215183616.

The previous prime is 56676667661. The next prime is 56676667759.

56676667665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56676667665 - 2² = 56676667661 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56676667596 and 56676667605.

It is not an unprimeable number, because it can be changed into a prime (56676667661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735352 + ... + 808761.

It is an arithmetic number, because the mean of its divisors is an integer number (5669986608).

Almost surely, 2^56676667665 is an apocalyptic number.

It is an amenable number.

56676667665 is a deficient number, since it is larger than the sum of its proper divisors (34043118063).

56676667665 is a wasteful number, since it uses less digits than its factorization.

56676667665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546568.

The product of its digits is 342921600, while the sum is 66.

The spelling of 56676667665 in words is "fifty-six billion, six hundred seventy-six million, six hundred sixty-seven thousand, six hundred sixty-five".