166808153 has 4 divisors (see below), whose sum is σ = 167117028. Its totient is φ = 166499280.

The previous prime is 166808141. The next prime is 166808177. The reversal of 166808153 is 351808661.

It is a happy number.

166808153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21557449 + 145250704 = 4643^2 + 12052^2 .

It is a cyclic number.

It is not a de Polignac number, because 166808153 - 2¹⁰ = 166807129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166808183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153626 + ... + 154707.

It is an arithmetic number, because the mean of its divisors is an integer number (41779257).

Almost surely, 2^166808153 is an apocalyptic number.

It is an amenable number.

166808153 is a deficient number, since it is larger than the sum of its proper divisors (308875).

166808153 is an equidigital number, since it uses as much as digits as its factorization.

166808153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308874.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 166808153 is about 12915.4230670157. The cubic root of 166808153 is about 550.4768899635.

The spelling of 166808153 in words is "one hundred sixty-six million, eight hundred eight thousand, one hundred fifty-three".