16500664 has 16 divisors (see below), whose sum is σ = 32567400. Its totient is φ = 7816032.

The previous prime is 16500647. The next prime is 16500677. The reversal of 16500664 is 46600561.

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, 54127 + ... + 54430.

Almost surely, 2^16500664 is an apocalyptic number.

It is an amenable number.

16500664 is a deficient number, since it is larger than the sum of its proper divisors (16066736).

16500664 is a wasteful number, since it uses less digits than its factorization.

16500664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108582 (or 108578 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 16500664 is about 4062.1009342457. The cubic root of 16500664 is about 254.5855834384.

The spelling of 16500664 in words is "sixteen million, five hundred thousand, six hundred sixty-four".