16972666 has 16 divisors (see below), whose sum is σ = 26693568. Its totient is φ = 8078400.

The previous prime is 16972663. The next prime is 16972679. The reversal of 16972666 is 66627961.

It is a super-2 number, since 2×16972666² = 576142782295112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16972663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10321 + ... + 11851.

It is an arithmetic number, because the mean of its divisors is an integer number (1668348).

Almost surely, 2^16972666 is an apocalyptic number.

16972666 is a deficient number, since it is larger than the sum of its proper divisors (9720902).

16972666 is a wasteful number, since it uses less digits than its factorization.

16972666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797.

The product of its digits is 163296, while the sum is 43.

The square root of 16972666 is about 4119.7895577323. The cubic root of 16972666 is about 256.9902745289.

The spelling of 16972666 in words is "sixteen million, nine hundred seventy-two thousand, six hundred sixty-six".