22100251795866 has 12 divisors (see below), whose sum is σ = 47883878891082. Its totient is φ = 7366750598616.

The previous prime is 22100251795859. The next prime is 22100251795871. The reversal of 22100251795866 is 66859715200122.

22100251795866 is a `hidden beast` number, since 2 + 2 + 1 + 0 + 0 + 2 + 51 + 7 + 9 + 586 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21523373570241 + 576878225625 = 4639329^2 + 759525^2 .

It is a super-2 number, since 2×22100251795866² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 613895883201 + ... + 613895883236.

Almost surely, 2^{22100251795866} is an apocalyptic number.

22100251795866 is an abundant number, since it is smaller than the sum of its proper divisors (25783627095216).

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

22100251795866 is a wasteful number, since it uses less digits than its factorization.

22100251795866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227791766445 (or 1227791766442 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

Adding to 22100251795866 its reverse (66859715200122), we get a palindrome (88959966995988).

The spelling of 22100251795866 in words is "twenty-two trillion, one hundred billion, two hundred fifty-one million, seven hundred ninety-five thousand, eight hundred sixty-six".