664854492 has 12 divisors (see below), whose sum is σ = 1551327176. Its totient is φ = 221618160.

The previous prime is 664854473. The next prime is 664854503. The reversal of 664854492 is 294458466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 27702259 + ... + 27702282.

Almost surely, 2^664854492 is an apocalyptic number.

It is an amenable number.

664854492 is an abundant number, since it is smaller than the sum of its proper divisors (886472684).

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

664854492 is a wasteful number, since it uses less digits than its factorization.

664854492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55404548 (or 55404546 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The square root of 664854492 is about 25784.7724829986. The cubic root of 664854492 is about 872.7882062530.

The spelling of 664854492 in words is "six hundred sixty-four million, eight hundred fifty-four thousand, four hundred ninety-two".