166625427 has 16 divisors (see below), whose sum is σ = 225987840. Its totient is φ = 109183200.

The previous prime is 166625423. The next prime is 166625453. The reversal of 166625427 is 724526661.

It is not a de Polignac number, because 166625427 - 2² = 166625423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166625423) 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 in 15 ways as a sum of consecutive naturals, for example, 81852 + ... + 83862.

It is an arithmetic number, because the mean of its divisors is an integer number (14124240).

Almost surely, 2^166625427 is an apocalyptic number.

166625427 is a deficient number, since it is larger than the sum of its proper divisors (59362413).

166625427 is a wasteful number, since it uses less digits than its factorization.

166625427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474.

The product of its digits is 120960, while the sum is 39.

The square root of 166625427 is about 12908.3471831215. The cubic root of 166625427 is about 550.2758142785.

The spelling of 166625427 in words is "one hundred sixty-six million, six hundred twenty-five thousand, four hundred twenty-seven".