16636664 has 32 divisors (see below), whose sum is σ = 34398000. Its totient is φ = 7480320.

The previous prime is 16636639. The next prime is 16636667. The reversal of 16636664 is 46663661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16636667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7562 + ... + 9510.

Almost surely, 2^16636664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16636664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17199000).

16636664 is an abundant number, since it is smaller than the sum of its proper divisors (17761336).

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

16636664 is a wasteful number, since it uses less digits than its factorization.

16636664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063 (or 2059 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 16636664 is about 4078.8066882362. The cubic root of 16636664 is about 255.2831098892.

The spelling of 16636664 in words is "sixteen million, six hundred thirty-six thousand, six hundred sixty-four".