166172711 has 2 divisors, whose sum is σ = 166172712. Its totient is φ = 166172710.

The previous prime is 166172627. The next prime is 166172717. The reversal of 166172711 is 117271661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166172711 - 2¹⁸ = 165910567 is a prime.

It is a super-2 number, since 2×166172711² = 55226739762179042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166172717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83086355 + 83086356.

It is an arithmetic number, because the mean of its divisors is an integer number (83086356).

Almost surely, 2^166172711 is an apocalyptic number.

166172711 is a deficient number, since it is larger than the sum of its proper divisors (1).

166172711 is an equidigital number, since it uses as much as digits as its factorization.

166172711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 32.

The square root of 166172711 is about 12890.7994709405. The cubic root of 166172711 is about 549.7770016082. Note that the first 3 decimals are identical.

The spelling of 166172711 in words is "one hundred sixty-six million, one hundred seventy-two thousand, seven hundred eleven".