166153365 has 36 divisors (see below), whose sum is σ = 335023884. Its totient is φ = 75954816.

The previous prime is 166153363. The next prime is 166153369. The reversal of 166153365 is 563351661.

166153365 is a `hidden beast` number, since 1 + 6 + 61 + 533 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113358609 + 52794756 = 10647^2 + 7266^2 .

It is not a de Polignac number, because 166153365 - 2¹ = 166153363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166153363) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35472 + ... + 39881.

It is an arithmetic number, because the mean of its divisors is an integer number (9306219).

Almost surely, 2^166153365 is an apocalyptic number.

166153365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166153365 is an abundant number, since it is smaller than the sum of its proper divisors (168870519).

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

166153365 is a wasteful number, since it uses less digits than its factorization.

166153365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75378 (or 75368 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 166153365 is about 12890.0490689524. The cubic root of 166153365 is about 549.7556655766.

The spelling of 166153365 in words is "one hundred sixty-six million, one hundred fifty-three thousand, three hundred sixty-five".