166472569 has 2 divisors, whose sum is σ = 166472570. Its totient is φ = 166472568.

The previous prime is 166472567. The next prime is 166472639. The reversal of 166472569 is 965274661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157828969 + 8643600 = 12563^2 + 2940^2 .

It is a cyclic number.

It is not a de Polignac number, because 166472569 - 2¹ = 166472567 is a prime.

It is a super-2 number, since 2×166472569² = 55426232458919522, which contains 22 as substring.

Together with 166472567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (166472561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83236284 + 83236285.

It is an arithmetic number, because the mean of its divisors is an integer number (83236285).

Almost surely, 2^166472569 is an apocalyptic number.

It is an amenable number.

166472569 is a deficient number, since it is larger than the sum of its proper divisors (1).

166472569 is an equidigital number, since it uses as much as digits as its factorization.

166472569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 166472569 is about 12902.4249271213. The cubic root of 166472569 is about 550.1074930396.

The spelling of 166472569 in words is "one hundred sixty-six million, four hundred seventy-two thousand, five hundred sixty-nine".