16940664 has 80 divisors (see below), whose sum is σ = 51124920. Its totient is φ = 5209920.

The previous prime is 16940639. The next prime is 16940689. The reversal of 16940664 is 46604961.

It is an interprime number because it is at equal distance from previous prime (16940639) and next prime (16940689).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7419 + ... + 9429.

Almost surely, 2^16940664 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 16940664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25562460).

16940664 is an abundant number, since it is smaller than the sum of its proper divisors (34184256).

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

16940664 is a wasteful number, since it uses less digits than its factorization.

16940664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042 (or 2029 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 16940664 is about 4115.9037889630. The cubic root of 16940664 is about 256.8286543272.

The spelling of 16940664 in words is "sixteen million, nine hundred forty thousand, six hundred sixty-four".