166203725 has 12 divisors (see below), whose sum is σ = 207007584. Its totient is φ = 132372720.

The previous prime is 166203721. The next prime is 166203731. The reversal of 166203725 is 527302661.

It is not a de Polignac number, because 166203725 - 2² = 166203721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166203691 and 166203700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166203721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8969 + ... + 20318.

It is an arithmetic number, because the mean of its divisors is an integer number (17250632).

Almost surely, 2^166203725 is an apocalyptic number.

It is an amenable number.

166203725 is a deficient number, since it is larger than the sum of its proper divisors (40803859).

166203725 is a wasteful number, since it uses less digits than its factorization.

166203725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29524 (or 29519 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 166203725 is about 12892.0023658080. The cubic root of 166203725 is about 549.8112024168.

The spelling of 166203725 in words is "one hundred sixty-six million, two hundred three thousand, seven hundred twenty-five".