166341645 has 12 divisors (see below), whose sum is σ = 288325596. Its totient is φ = 88715520.

The previous prime is 166341631. The next prime is 166341653. The reversal of 166341645 is 546143661.

It is a happy number.

166341645 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 4 + 1 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16670889 + 149670756 = 4083^2 + 12234^2 .

It is not a de Polignac number, because 166341645 - 2⁸ = 166341389 is a prime.

It is a super-3 number, since 3×166341645³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1848196 + ... + 1848285.

It is an arithmetic number, because the mean of its divisors is an integer number (24027133).

Almost surely, 2^166341645 is an apocalyptic number.

166341645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166341645 is a deficient number, since it is larger than the sum of its proper divisors (121983951).

166341645 is a wasteful number, since it uses less digits than its factorization.

166341645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696492 (or 3696489 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166341645 is about 12897.3503092690. The cubic root of 166341645 is about 549.9632427226.

The spelling of 166341645 in words is "one hundred sixty-six million, three hundred forty-one thousand, six hundred forty-five".