667772424 has 80 divisors (see below), whose sum is σ = 2040437520. Its totient is φ = 202353120.

The previous prime is 667772407. The next prime is 667772447. The reversal of 667772424 is 424277766.

It is a self number, because there is not a number n which added to its sum of digits gives 667772424.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39714 + ... + 53969.

It is an arithmetic number, because the mean of its divisors is an integer number (25505469).

Almost surely, 2^667772424 is an apocalyptic number.

It is an amenable number.

667772424 is an abundant number, since it is smaller than the sum of its proper divisors (1372665096).

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

667772424 is a wasteful number, since it uses less digits than its factorization.

667772424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93712 (or 93699 counting only the distinct ones).

The product of its digits is 790272, while the sum is 45.

The square root of 667772424 is about 25841.2930017056. The cubic root of 667772424 is about 874.0631819531.

The spelling of 667772424 in words is "six hundred sixty-seven million, seven hundred seventy-two thousand, four hundred twenty-four".