166925749 has 2 divisors, whose sum is σ = 166925750. Its totient is φ = 166925748.

The previous prime is 166925741. The next prime is 166925807. The reversal of 166925749 is 947529661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98863249 + 68062500 = 9943^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 166925749 - 2³ = 166925741 is a prime.

It is a super-2 number, since 2×166925749² = 55728411358422002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166925741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83462874 + 83462875.

It is an arithmetic number, because the mean of its divisors is an integer number (83462875).

Almost surely, 2^166925749 is an apocalyptic number.

It is an amenable number.

166925749 is a deficient number, since it is larger than the sum of its proper divisors (1).

166925749 is an equidigital number, since it uses as much as digits as its factorization.

166925749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 166925749 is about 12919.9748064770. The cubic root of 166925749 is about 550.6062175237.

The spelling of 166925749 in words is "one hundred sixty-six million, nine hundred twenty-five thousand, seven hundred forty-nine".