166704385 has 12 divisors (see below), whose sum is σ = 211130388. Its totient is φ = 126343008.

The previous prime is 166704371. The next prime is 166704389. The reversal of 166704385 is 583407661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84566416 + 82137969 = 9196^2 + 9063^2 .

It is not a de Polignac number, because 166704385 - 2⁵ = 166704353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166704389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44374 + ... + 47983.

It is an arithmetic number, because the mean of its divisors is an integer number (17594199).

Almost surely, 2^166704385 is an apocalyptic number.

It is an amenable number.

166704385 is a deficient number, since it is larger than the sum of its proper divisors (44426003).

166704385 is an equidigital number, since it uses as much as digits as its factorization.

166704385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92400 (or 92381 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 166704385 is about 12911.4052294861. The cubic root of 166704385 is about 550.3627194153.

The spelling of 166704385 in words is "one hundred sixty-six million, seven hundred four thousand, three hundred eighty-five".