22663121661 has 12 divisors (see below), whose sum is σ = 32745042720. Its totient is φ = 15104398920.

The previous prime is 22663121659. The next prime is 22663121669. The reversal of 22663121661 is 16612136622.

22663121661 is a `hidden beast` number, since 2 + 2 + 6 + 631 + 2 + 16 + 6 + 1 = 666.

It is not a de Polignac number, because 22663121661 - 2¹ = 22663121659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22663121669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329241 + ... + 392078.

It is an arithmetic number, because the mean of its divisors is an integer number (2728753560).

Almost surely, 2^22663121661 is an apocalyptic number.

It is an amenable number.

22663121661 is a deficient number, since it is larger than the sum of its proper divisors (10081921059).

22663121661 is a wasteful number, since it uses less digits than its factorization.

22663121661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724816 (or 724813 counting only the distinct ones).

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

The spelling of 22663121661 in words is "twenty-two billion, six hundred sixty-three million, one hundred twenty-one thousand, six hundred sixty-one".