166804879419 has 24 divisors (see below), whose sum is σ = 250475163120. Its totient is φ = 110931296256.

The previous prime is 166804879379. The next prime is 166804879441. The reversal of 166804879419 is 914978408661.

166804879419 is a `hidden beast` number, since 1 + 6 + 68 + 0 + 487 + 94 + 1 + 9 = 666.

It is not a de Polignac number, because 166804879419 - 2¹³ = 166804871227 is a prime.

It is a super-2 number, since 2×166804879419² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166804879499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 739782 + ... + 938555.

It is an arithmetic number, because the mean of its divisors is an integer number (10436465130).

Almost surely, 2^166804879419 is an apocalyptic number.

166804879419 is a deficient number, since it is larger than the sum of its proper divisors (83670283701).

166804879419 is an equidigital number, since it uses as much as digits as its factorization.

166804879419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678761 (or 1678749 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 166804879419 in words is "one hundred sixty-six billion, eight hundred four million, eight hundred seventy-nine thousand, four hundred nineteen".