16663992 has 16 divisors (see below), whose sum is σ = 41660040. Its totient is φ = 5554656.

The previous prime is 16663987. The next prime is 16664003. The reversal of 16663992 is 29936661.

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, 347143 + ... + 347190.

Almost surely, 2^16663992 is an apocalyptic number.

16663992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16663992 is an abundant number, since it is smaller than the sum of its proper divisors (24996048).

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

16663992 is a wasteful number, since it uses less digits than its factorization.

16663992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694342 (or 694338 counting only the distinct ones).

The product of its digits is 104976, while the sum is 42.

The square root of 16663992 is about 4082.1553130669. The cubic root of 16663992 is about 255.4228125849.

The spelling of 16663992 in words is "sixteen million, six hundred sixty-three thousand, nine hundred ninety-two".