18566671912337 has 2 divisors, whose sum is σ = 18566671912338. Its totient is φ = 18566671912336.

The previous prime is 18566671912331. The next prime is 18566671912381. The reversal of 18566671912337 is 73321917666581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17979033148561 + 587638763776 = 4240169^2 + 766576^2 .

It is a cyclic number.

It is not a de Polignac number, because 18566671912337 - 2²² = 18566667718033 is a prime.

It is a super-2 number, since 2×18566671912337² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18566671912331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9283335956168 + 9283335956169.

It is an arithmetic number, because the mean of its divisors is an integer number (9283335956169).

Almost surely, 2^{18566671912337} is an apocalyptic number.

It is an amenable number.

18566671912337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18566671912337 is an equidigital number, since it uses as much as digits as its factorization.

18566671912337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 65.

The spelling of 18566671912337 in words is "eighteen trillion, five hundred sixty-six billion, six hundred seventy-one million, nine hundred twelve thousand, three hundred thirty-seven".