166926825 has 120 divisors (see below), whose sum is σ = 353524248. Its totient is φ = 77137920.

The previous prime is 166926803. The next prime is 166926853. The reversal of 166926825 is 528629661.

It can be written as a sum of positive squares in 12 ways, for example, as 47155689 + 119771136 = 6867^2 + 10944^2 .

It is not a de Polignac number, because 166926825 - 2⁸ = 166926569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 447339 + ... + 447711.

Almost surely, 2^166926825 is an apocalyptic number.

166926825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166926825 is an abundant number, since it is smaller than the sum of its proper divisors (186597423).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166926825 is a wasteful number, since it uses less digits than its factorization.

166926825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 411 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 166926825 is about 12920.0164473580. The cubic root of 166926825 is about 550.6074005866.

The spelling of 166926825 in words is "one hundred sixty-six million, nine hundred twenty-six thousand, eight hundred twenty-five".