166290797 has 2 divisors, whose sum is σ = 166290798. Its totient is φ = 166290796.

The previous prime is 166290781. The next prime is 166290799. The reversal of 166290797 is 797092661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158105476 + 8185321 = 12574^2 + 2861^2 .

It is an emirp because it is prime and its reverse (797092661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166290797 - 2⁴ = 166290781 is a prime.

Together with 166290799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166290799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83145398 + 83145399.

It is an arithmetic number, because the mean of its divisors is an integer number (83145399).

Almost surely, 2^166290797 is an apocalyptic number.

It is an amenable number.

166290797 is a deficient number, since it is larger than the sum of its proper divisors (1).

166290797 is an equidigital number, since it uses as much as digits as its factorization.

166290797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 166290797 is about 12895.3789009862. The cubic root of 166290797 is about 549.9071986676.

The spelling of 166290797 in words is "one hundred sixty-six million, two hundred ninety thousand, seven hundred ninety-seven".