166125530 has 16 divisors (see below), whose sum is σ = 316616040. Its totient is φ = 62541312.

The previous prime is 166125529. The next prime is 166125551. The reversal of 166125530 is 35521661.

It can be written as a sum of positive squares in 4 ways, for example, as 101949409 + 64176121 = 10097^2 + 8011^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166125493 and 166125502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488435 + ... + 488774.

Almost surely, 2^166125530 is an apocalyptic number.

166125530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166125530 is a deficient number, since it is larger than the sum of its proper divisors (150490510).

166125530 is a wasteful number, since it uses less digits than its factorization.

166125530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977233.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 166125530 is about 12888.9693148832. The cubic root of 166125530 is about 549.7249644157.

The spelling of 166125530 in words is "one hundred sixty-six million, one hundred twenty-five thousand, five hundred thirty".