166383257 has 2 divisors, whose sum is σ = 166383258. Its totient is φ = 166383256.

The previous prime is 166383251. The next prime is 166383263. The reversal of 166383257 is 752383661.

It is a balanced prime because it is at equal distance from previous prime (166383251) and next prime (166383263).

It can be written as a sum of positive squares in only one way, i.e., 143304841 + 23078416 = 11971^2 + 4804^2 .

It is a cyclic number.

It is not a de Polignac number, because 166383257 - 2⁶ = 166383193 is a prime.

It is not a weakly prime, because it can be changed into another prime (166383251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83191628 + 83191629.

It is an arithmetic number, because the mean of its divisors is an integer number (83191629).

Almost surely, 2^166383257 is an apocalyptic number.

It is an amenable number.

166383257 is a deficient number, since it is larger than the sum of its proper divisors (1).

166383257 is an equidigital number, since it uses as much as digits as its factorization.

166383257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 166383257 is about 12898.9634079642. The cubic root of 166383257 is about 550.0090984721.

The spelling of 166383257 in words is "one hundred sixty-six million, three hundred eighty-three thousand, two hundred fifty-seven".