166013251 has 2 divisors, whose sum is σ = 166013252. Its totient is φ = 166013250.

The previous prime is 166013179. The next prime is 166013261. The reversal of 166013251 is 152310661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166013251 - 2⁹ = 166012739 is a prime.

It is not a weakly prime, because it can be changed into another prime (166013261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83006625 + 83006626.

It is an arithmetic number, because the mean of its divisors is an integer number (83006626).

Almost surely, 2^166013251 is an apocalyptic number.

166013251 is a deficient number, since it is larger than the sum of its proper divisors (1).

166013251 is an equidigital number, since it uses as much as digits as its factorization.

166013251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 166013251 is about 12884.6129549940. The cubic root of 166013251 is about 549.6010892555.

The spelling of 166013251 in words is "one hundred sixty-six million, thirteen thousand, two hundred fifty-one".