16972566 has 32 divisors (see below), whose sum is σ = 37550688. Its totient is φ = 5080320.

The previous prime is 16972559. The next prime is 16972577. The reversal of 16972566 is 66527961.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55 + ... + 5826.

It is an arithmetic number, because the mean of its divisors is an integer number (1173459).

Almost surely, 2^16972566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16972566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18775344).

16972566 is an abundant number, since it is smaller than the sum of its proper divisors (20578122).

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

16972566 is a wasteful number, since it uses less digits than its factorization.

16972566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936.

The product of its digits is 136080, while the sum is 42.

The square root of 16972566 is about 4119.7774211722. Note that the first 3 decimals coincide. The cubic root of 16972566 is about 256.9897698139.

The spelling of 16972566 in words is "sixteen million, nine hundred seventy-two thousand, five hundred sixty-six".