18166680276479 has 12 divisors (see below), whose sum is σ = 21232823734008. Its totient is φ = 15497641933200.

The previous prime is 18166680276413. The next prime is 18166680276499. The reversal of 18166680276479 is 97467208666181.

It is not a de Polignac number, because 18166680276479 - 2⁴⁰ = 17067168648703 is a prime.

It is a super-2 number, since 2×18166680276479² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18166680276499) 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, 878540792 + ... + 878561469.

It is an arithmetic number, because the mean of its divisors is an integer number (1769401977834).

Almost surely, 2^{18166680276479} is an apocalyptic number.

18166680276479 is a deficient number, since it is larger than the sum of its proper divisors (3066143457529).

18166680276479 is a wasteful number, since it uses less digits than its factorization.

18166680276479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757102486 (or 1757102479 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 71.

The spelling of 18166680276479 in words is "eighteen trillion, one hundred sixty-six billion, six hundred eighty million, two hundred seventy-six thousand, four hundred seventy-nine".