16666612031 has 8 divisors (see below), whose sum is σ = 17669844144. Its totient is φ = 15665918080.

The previous prime is 16666612019. The next prime is 16666612043. The reversal of 16666612031 is 13021666661.

It is an interprime number because it is at equal distance from previous prime (16666612019) and next prime (16666612043).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16666612031 - 2²² = 16662417727 is a prime.

It is a super-2 number, since 2×16666612031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666612051) 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, 621005 + ... + 647286.

It is an arithmetic number, because the mean of its divisors is an integer number (2208730518).

Almost surely, 2^16666612031 is an apocalyptic number.

16666612031 is a deficient number, since it is larger than the sum of its proper divisors (1003232113).

16666612031 is a wasteful number, since it uses less digits than its factorization.

16666612031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269081.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 16666612031 in words is "sixteen billion, six hundred sixty-six million, six hundred twelve thousand, thirty-one".