166365045 has 144 divisors (see below), whose sum is σ = 386268480. Its totient is φ = 65499840.

The previous prime is 166365013. The next prime is 166365053. The reversal of 166365045 is 540563661.

166365045 is a `hidden beast` number, since 16 + 636 + 5 + 0 + 4 + 5 = 666.

It is not a de Polignac number, because 166365045 - 2⁵ = 166365013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8756046 + ... + 8756064.

It is an arithmetic number, because the mean of its divisors is an integer number (2682420).

Almost surely, 2^166365045 is an apocalyptic number.

166365045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166365045 is an abundant number, since it is smaller than the sum of its proper divisors (219903435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166365045 is a wasteful number, since it uses less digits than its factorization.

166365045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 166365045 is about 12898.2574404452. The cubic root of 166365045 is about 549.9890300842.

The spelling of 166365045 in words is "one hundred sixty-six million, three hundred sixty-five thousand, forty-five".