18661222839627 has 12 divisors (see below), whose sum is σ = 26964384951504. Its totient is φ = 12436529706000.

The previous prime is 18661222839617. The next prime is 18661222839647. The reversal of 18661222839627 is 72693822216681.

18661222839627 is a `hidden beast` number, since 1 + 8 + 6 + 6 + 12 + 228 + 396 + 2 + 7 = 666.

It is not a de Polignac number, because 18661222839627 - 2⁷ = 18661222839499 is a prime.

It is a super-2 number, since 2×18661222839627² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18661222839617) 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, 357099124 + ... + 357151377.

It is an arithmetic number, because the mean of its divisors is an integer number (2247032079292).

Almost surely, 2^{18661222839627} is an apocalyptic number.

18661222839627 is a deficient number, since it is larger than the sum of its proper divisors (8303162111877).

18661222839627 is a wasteful number, since it uses less digits than its factorization.

18661222839627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714253410 (or 714253407 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 18661222839627 in words is "eighteen trillion, six hundred sixty-one billion, two hundred twenty-two million, eight hundred thirty-nine thousand, six hundred twenty-seven".