664213016 has 16 divisors (see below), whose sum is σ = 1247943240. Its totient is φ = 331428160.

The previous prime is 664213003. The next prime is 664213049. The reversal of 664213016 is 610312466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 664213016.

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, 80621 + ... + 88476.

Almost surely, 2^664213016 is an apocalyptic number.

It is an amenable number.

664213016 is a deficient number, since it is larger than the sum of its proper divisors (583730224).

664213016 is a wasteful number, since it uses less digits than its factorization.

664213016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169594 (or 169590 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 664213016 is about 25772.3304340139. The cubic root of 664213016 is about 872.5074165701.

The spelling of 664213016 in words is "six hundred sixty-four million, two hundred thirteen thousand, sixteen".