166604645 has 8 divisors (see below), whose sum is σ = 200019456. Its totient is φ = 133221136.

The previous prime is 166604639. The next prime is 166604653. The reversal of 166604645 is 546406661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166604645 - 2⁴ = 166604629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166604599 and 166604608.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6164 + ... + 19266.

It is an arithmetic number, because the mean of its divisors is an integer number (25002432).

Almost surely, 2^166604645 is an apocalyptic number.

It is an amenable number.

166604645 is a deficient number, since it is larger than the sum of its proper divisors (33414811).

166604645 is a wasteful number, since it uses less digits than its factorization.

166604645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15651.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 166604645 is about 12907.5421750231. The cubic root of 166604645 is about 550.2529360026.

The spelling of 166604645 in words is "one hundred sixty-six million, six hundred four thousand, six hundred forty-five".