667293512 has 12 divisors (see below), whose sum is σ = 1251312345. Its totient is φ = 333610224.

The previous prime is 667293499. The next prime is 667293527. The reversal of 667293512 is 215392766.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 600936196 + 66357316 = 24514^2 + 8146^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18266.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667293512.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 68498 + ... + 77630.

Almost surely, 2^667293512 is an apocalyptic number.

It is an amenable number.

667293512 is a deficient number, since it is larger than the sum of its proper divisors (584018833).

667293512 is an frugal number, since it uses more digits than its factorization.

667293512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18272 (or 9135 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 667293512 is about 25832.0249303070. The cubic root of 667293512 is about 873.8541788848.

The spelling of 667293512 in words is "six hundred sixty-seven million, two hundred ninety-three thousand, five hundred twelve".