166650645 has 32 divisors (see below), whose sum is σ = 307549440. Its totient is φ = 75479040.

The previous prime is 166650619. The next prime is 166650647. The reversal of 166650645 is 546056661.

It is not a de Polignac number, because 166650645 - 2⁵ = 166650613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166650647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4165 + ... + 18725.

It is an arithmetic number, because the mean of its divisors is an integer number (9610920).

Almost surely, 2^166650645 is an apocalyptic number.

166650645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166650645 is a deficient number, since it is larger than the sum of its proper divisors (140898795).

166650645 is a wasteful number, since it uses less digits than its factorization.

166650645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14685.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 166650645 is about 12909.3239559630. The cubic root of 166650645 is about 550.3035734581.

The spelling of 166650645 in words is "one hundred sixty-six million, six hundred fifty thousand, six hundred forty-five".