667890456 has 32 divisors (see below), whose sum is σ = 1673833200. Its totient is φ = 222082560.

The previous prime is 667890449. The next prime is 667890463. The reversal of 667890456 is 654098766.

It is an interprime number because it is at equal distance from previous prime (667890449) and next prime (667890463).

It is a super-2 number, since 2×667890456² = 892155322431775872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667890399 and 667890408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24205 + ... + 43836.

Almost surely, 2^667890456 is an apocalyptic number.

It is an amenable number.

667890456 is an abundant number, since it is smaller than the sum of its proper divisors (1005942744).

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

667890456 is a wasteful number, since it uses less digits than its factorization.

667890456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68459 (or 68455 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 667890456 is about 25843.5766874479. The cubic root of 667890456 is about 874.1146772150.

The spelling of 667890456 in words is "six hundred sixty-seven million, eight hundred ninety thousand, four hundred fifty-six".