166653325 has 6 divisors (see below), whose sum is σ = 206650154. Its totient is φ = 133322640.

The previous prime is 166653317. The next prime is 166653341. The reversal of 166653325 is 523356661.

It can be written as a sum of positive squares in 3 ways, for example, as 4778596 + 161874729 = 2186^2 + 12723^2 .

It is not a de Polignac number, because 166653325 - 2³ = 166653317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3333042 + ... + 3333091.

Almost surely, 2^166653325 is an apocalyptic number.

It is an amenable number.

166653325 is a deficient number, since it is larger than the sum of its proper divisors (39996829).

166653325 is an equidigital number, since it uses as much as digits as its factorization.

166653325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666143 (or 6666138 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 166653325 is about 12909.4277564887. The cubic root of 166653325 is about 550.3065233530.

The spelling of 166653325 in words is "one hundred sixty-six million, six hundred fifty-three thousand, three hundred twenty-five".