166625073 has 16 divisors (see below), whose sum is σ = 249829440. Its totient is φ = 109743552.

The previous prime is 166625071. The next prime is 166625077. The reversal of 166625073 is 370526661.

It is not a de Polignac number, because 166625073 - 2¹ = 166625071 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166625071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34936 + ... + 39417.

It is an arithmetic number, because the mean of its divisors is an integer number (15614340).

Almost surely, 2^166625073 is an apocalyptic number.

It is an amenable number.

166625073 is a deficient number, since it is larger than the sum of its proper divisors (83204367).

166625073 is an equidigital number, since it uses as much as digits as its factorization.

166625073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74445 (or 74439 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 166625073 is about 12908.3334710566. Note that the first 3 decimals coincide. The cubic root of 166625073 is about 550.2754245865.

The spelling of 166625073 in words is "one hundred sixty-six million, six hundred twenty-five thousand, seventy-three".