166043625 has 32 divisors (see below), whose sum is σ = 301421952. Its totient is φ = 80504000.

The previous prime is 166043623. The next prime is 166043627. The reversal of 166043625 is 526340661.

It is an interprime number because it is at equal distance from previous prime (166043623) and next prime (166043627).

It is not a de Polignac number, because 166043625 - 2¹ = 166043623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (166043623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16002 + ... + 24251.

It is an arithmetic number, because the mean of its divisors is an integer number (9419436).

Almost surely, 2^166043625 is an apocalyptic number.

166043625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166043625 is a deficient number, since it is larger than the sum of its proper divisors (135378327).

166043625 is a wasteful number, since it uses less digits than its factorization.

166043625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40282 (or 40272 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 166043625 is about 12885.7915938447. The cubic root of 166043625 is about 549.6346057878.

The spelling of 166043625 in words is "one hundred sixty-six million, forty-three thousand, six hundred twenty-five".