16666956 has 36 divisors (see below), whose sum is σ = 42332472. Its totient is φ = 5529024.

The previous prime is 16666931. The next prime is 16666957. The reversal of 16666956 is 65966661.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7395 + ... + 9381.

It is an arithmetic number, because the mean of its divisors is an integer number (1175902).

Almost surely, 2^16666956 is an apocalyptic number.

It is an amenable number.

16666956 is an abundant number, since it is smaller than the sum of its proper divisors (25665516).

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

16666956 is a wasteful number, since it uses less digits than its factorization.

16666956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230 (or 2225 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 16666956 is about 4082.5183404365. The cubic root of 16666956 is about 255.4379555817.

The spelling of 16666956 in words is "sixteen million, six hundred sixty-six thousand, nine hundred fifty-six".