166232257 has 2 divisors, whose sum is σ = 166232258. Its totient is φ = 166232256.

The previous prime is 166232207. The next prime is 166232267. The reversal of 166232257 is 752232661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164634561 + 1597696 = 12831^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 166232257 - 2²³ = 157843649 is a prime.

It is not a weakly prime, because it can be changed into another prime (166232207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83116128 + 83116129.

It is an arithmetic number, because the mean of its divisors is an integer number (83116129).

Almost surely, 2^166232257 is an apocalyptic number.

It is an amenable number.

166232257 is a deficient number, since it is larger than the sum of its proper divisors (1).

166232257 is an equidigital number, since it uses as much as digits as its factorization.

166232257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 166232257 is about 12893.1088958404. The cubic root of 166232257 is about 549.8426624330.

The spelling of 166232257 in words is "one hundred sixty-six million, two hundred thirty-two thousand, two hundred fifty-seven".