166325705 has 32 divisors (see below), whose sum is σ = 260112384. Its totient is φ = 99081216.

The previous prime is 166325657. The next prime is 166325707. The reversal of 166325705 is 507523661.

It is not a de Polignac number, because 166325705 - 2⁶ = 166325641 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (166325707) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3017 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (8128512).

Almost surely, 2^166325705 is an apocalyptic number.

It is an amenable number.

166325705 is a deficient number, since it is larger than the sum of its proper divisors (93786679).

166325705 is a wasteful number, since it uses less digits than its factorization.

166325705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21545.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 166325705 is about 12896.7323380770. The cubic root of 166325705 is about 549.9456750751.

The spelling of 166325705 in words is "one hundred sixty-six million, three hundred twenty-five thousand, seven hundred five".