166090271 has 2 divisors, whose sum is σ = 166090272. Its totient is φ = 166090270.

The previous prime is 166090261. The next prime is 166090313. The reversal of 166090271 is 172090661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166090271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166090201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83045135 + 83045136.

It is an arithmetic number, because the mean of its divisors is an integer number (83045136).

Almost surely, 2^166090271 is an apocalyptic number.

166090271 is a deficient number, since it is larger than the sum of its proper divisors (1).

166090271 is an equidigital number, since it uses as much as digits as its factorization.

166090271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 166090271 is about 12887.6014447996. The cubic root of 166090271 is about 549.6860698842.

The spelling of 166090271 in words is "one hundred sixty-six million, ninety thousand, two hundred seventy-one".