22636451166661 has 16 divisors (see below), whose sum is σ = 23440649721840. Its totient is φ = 21833832545280.

The previous prime is 22636451166629. The next prime is 22636451166709. The reversal of 22636451166661 is 16666115463622.

It can be written as a sum of positive squares in 8 ways, for example, as 4383604814436 + 18252846352225 = 2093706^2 + 4272335^2 .

It is a cyclic number.

It is not a de Polignac number, because 22636451166661 - 2⁵ = 22636451166629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22636451166361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325871245 + ... + 325940701.

It is an arithmetic number, because the mean of its divisors is an integer number (1465040607615).

Almost surely, 2^{22636451166661} is an apocalyptic number.

It is an amenable number.

22636451166661 is a deficient number, since it is larger than the sum of its proper divisors (804198555179).

22636451166661 is a wasteful number, since it uses less digits than its factorization.

22636451166661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80664.

The product of its digits is 11197440, while the sum is 55.

The spelling of 22636451166661 in words is "twenty-two trillion, six hundred thirty-six billion, four hundred fifty-one million, one hundred sixty-six thousand, six hundred sixty-one".