166851929 has 2 divisors, whose sum is σ = 166851930. Its totient is φ = 166851928.

The previous prime is 166851887. The next prime is 166851943. The reversal of 166851929 is 929158661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92064025 + 74787904 = 9595^2 + 8648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166851929 is a prime.

It is a super-2 number, since 2×166851929² = 55679132422042082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166821929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83425964 + 83425965.

It is an arithmetic number, because the mean of its divisors is an integer number (83425965).

Almost surely, 2^166851929 is an apocalyptic number.

It is an amenable number.

166851929 is a deficient number, since it is larger than the sum of its proper divisors (1).

166851929 is an equidigital number, since it uses as much as digits as its factorization.

166851929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 47.

The square root of 166851929 is about 12917.1176738466. The cubic root of 166851929 is about 550.5250402251.

The spelling of 166851929 in words is "one hundred sixty-six million, eight hundred fifty-one thousand, nine hundred twenty-nine".