166404129 has 8 divisors (see below), whose sum is σ = 221932512. Its totient is φ = 110905920.

The previous prime is 166404107. The next prime is 166404151. The reversal of 166404129 is 921404661.

It is an interprime number because it is at equal distance from previous prime (166404107) and next prime (166404151).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166404129 - 2⁵ = 166404097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166404129.

It is not an unprimeable number, because it can be changed into a prime (166404169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14694 + ... + 23424.

It is an arithmetic number, because the mean of its divisors is an integer number (27741564).

Almost surely, 2^166404129 is an apocalyptic number.

It is an amenable number.

166404129 is a deficient number, since it is larger than the sum of its proper divisors (55528383).

166404129 is an equidigital number, since it uses as much as digits as its factorization.

166404129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15087.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 166404129 is about 12899.7724398533. The cubic root of 166404129 is about 550.0320961986.

The spelling of 166404129 in words is "one hundred sixty-six million, four hundred four thousand, one hundred twenty-nine".