667672621584 has 20 divisors (see below), whose sum is σ = 1724820939216. Its totient is φ = 222557540512.

The previous prime is 667672621571. The next prime is 667672621607. The reversal of 667672621584 is 485126276766.

It is a happy number.

It is a super-2 number, since 2×667672621584² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6954923094 + ... + 6954923189.

Almost surely, 2^667672621584 is an apocalyptic number.

It is an amenable number.

667672621584 is an abundant number, since it is smaller than the sum of its proper divisors (1057148317632).

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

667672621584 is a wasteful number, since it uses less digits than its factorization.

667672621584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13909846294 (or 13909846288 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 60.

The spelling of 667672621584 in words is "six hundred sixty-seven billion, six hundred seventy-two million, six hundred twenty-one thousand, five hundred eighty-four".