18566671962337 has 2 divisors, whose sum is σ = 18566671962338. Its totient is φ = 18566671962336.

The previous prime is 18566671962269. The next prime is 18566671962407. The reversal of 18566671962337 is 73326917666581.

It is an a-pointer prime, because the next prime (18566671962407) can be obtained adding 18566671962337 to its sum of digits (70).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16245083409361 + 2321588552976 = 4030519^2 + 1523676^2 .

It is a cyclic number.

It is not a de Polignac number, because 18566671962337 - 2²⁷ = 18566537744609 is a prime.

It is not a weakly prime, because it can be changed into another prime (18566671912337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9283335981168 + 9283335981169.

It is an arithmetic number, because the mean of its divisors is an integer number (9283335981169).

Almost surely, 2^{18566671962337} is an apocalyptic number.

It is an amenable number.

18566671962337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18566671962337 is an equidigital number, since it uses as much as digits as its factorization.

18566671962337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411505920, while the sum is 70.

The spelling of 18566671962337 in words is "eighteen trillion, five hundred sixty-six billion, six hundred seventy-one million, nine hundred sixty-two thousand, three hundred thirty-seven".