166352081 has 4 divisors (see below), whose sum is σ = 190116672. Its totient is φ = 142587492.

The previous prime is 166352051. The next prime is 166352083. The reversal of 166352081 is 180253661.

It is a happy number.

166352081 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166352081 - 2²² = 162157777 is a prime.

It is a super-2 number, since 2×166352081² = 55346029706061122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166352083) 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, 11882285 + ... + 11882298.

It is an arithmetic number, because the mean of its divisors is an integer number (47529168).

Almost surely, 2^166352081 is an apocalyptic number.

It is an amenable number.

166352081 is a deficient number, since it is larger than the sum of its proper divisors (23764591).

166352081 is an equidigital number, since it uses as much as digits as its factorization.

166352081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23764590.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 166352081 is about 12897.7548821491. The cubic root of 166352081 is about 549.9747437438.

The spelling of 166352081 in words is "one hundred sixty-six million, three hundred fifty-two thousand, eighty-one".