667651460686 has 12 divisors (see below), whose sum is σ = 1164983671368. Its totient is φ = 286136340252.

The previous prime is 667651460603. The next prime is 667651460687. The reversal of 667651460686 is 686064156766.

667651460686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×667651460686² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667651460687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3406384906 + ... + 3406385101.

It is an arithmetic number, because the mean of its divisors is an integer number (97081972614).

Almost surely, 2^667651460686 is an apocalyptic number.

667651460686 is a deficient number, since it is larger than the sum of its proper divisors (497332210682).

667651460686 is a wasteful number, since it uses less digits than its factorization.

667651460686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812770023 (or 6812770016 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 667651460686 in words is "six hundred sixty-seven billion, six hundred fifty-one million, four hundred sixty thousand, six hundred eighty-six".