166376429 has 2 divisors, whose sum is σ = 166376430. Its totient is φ = 166376428.

The previous prime is 166376423. The next prime is 166376459. The reversal of 166376429 is 924673661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138603529 + 27772900 = 11773^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 166376429 - 2⁸ = 166376173 is a prime.

It is a super-2 number, since 2×166376429² = 55362232253584082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166376429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166376423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83188214 + 83188215.

It is an arithmetic number, because the mean of its divisors is an integer number (83188215).

Almost surely, 2^166376429 is an apocalyptic number.

It is an amenable number.

166376429 is a deficient number, since it is larger than the sum of its proper divisors (1).

166376429 is an equidigital number, since it uses as much as digits as its factorization.

166376429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 166376429 is about 12898.6987328180. The cubic root of 166376429 is about 550.0015746511.

The spelling of 166376429 in words is "one hundred sixty-six million, three hundred seventy-six thousand, four hundred twenty-nine".