166061625 has 16 divisors (see below), whose sum is σ = 276327168. Its totient is φ = 88566000.

The previous prime is 166061617. The next prime is 166061659. The reversal of 166061625 is 526160661.

It is not a de Polignac number, because 166061625 - 2³ = 166061617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221041 + ... + 221790.

It is an arithmetic number, because the mean of its divisors is an integer number (17270448).

Almost surely, 2^166061625 is an apocalyptic number.

166061625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166061625 is a deficient number, since it is larger than the sum of its proper divisors (110265543).

166061625 is an equidigital number, since it uses as much as digits as its factorization.

166061625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442849 (or 442839 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 166061625 is about 12886.4900186203. The cubic root of 166061625 is about 549.6544661617.

The spelling of 166061625 in words is "one hundred sixty-six million, sixty-one thousand, six hundred twenty-five".