166090711 has 4 divisors (see below), whose sum is σ = 169224552. Its totient is φ = 162956872.

The previous prime is 166090681. The next prime is 166090733. The reversal of 166090711 is 117090661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117090661 = 29 ⋅4037609.

It is a cyclic number.

It is not a de Polignac number, because 166090711 - 2⁷ = 166090583 is a prime.

It is a super-2 number, since 2×166090711² = 55172248560971042, which 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 (166090741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566841 + ... + 1566946.

It is an arithmetic number, because the mean of its divisors is an integer number (42306138).

Almost surely, 2^166090711 is an apocalyptic number.

166090711 is a deficient number, since it is larger than the sum of its proper divisors (3133841).

166090711 is an equidigital number, since it uses as much as digits as its factorization.

166090711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133840.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 166090711 is about 12887.6185154589. The cubic root of 166090711 is about 549.6865552863.

Subtracting from 166090711 its reverse (117090661), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 166090711 in words is "one hundred sixty-six million, ninety thousand, seven hundred eleven".