166897625 has 16 divisors (see below), whose sum is σ = 208650000. Its totient is φ = 133286400.

The previous prime is 166897613. The next prime is 166897649. The reversal of 166897625 is 526798661.

It can be written as a sum of positive squares in 8 ways, for example, as 63936016 + 102961609 = 7996^2 + 10147^2 .

It is not a de Polignac number, because 166897625 - 2¹⁴ = 166881241 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133001 + ... + 134249.

It is an arithmetic number, because the mean of its divisors is an integer number (13040625).

Almost surely, 2^166897625 is an apocalyptic number.

It is an amenable number.

166897625 is a deficient number, since it is larger than the sum of its proper divisors (41752375).

166897625 is a wasteful number, since it uses less digits than its factorization.

166897625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333 (or 2323 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 166897625 is about 12918.8863684143. The cubic root of 166897625 is about 550.5752933571.

The spelling of 166897625 in words is "one hundred sixty-six million, eight hundred ninety-seven thousand, six hundred twenty-five".