166271653 has 4 divisors (see below), whose sum is σ = 169408908. Its totient is φ = 163134400.

The previous prime is 166271647. The next prime is 166271657. The reversal of 166271653 is 356172661.

166271653 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 142134084 + 24137569 = 11922^2 + 4913^2 .

It is a cyclic number.

It is not a de Polignac number, because 166271653 - 2¹⁷ = 166140581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166271657) 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, 1568548 + ... + 1568653.

It is an arithmetic number, because the mean of its divisors is an integer number (42352227).

Almost surely, 2^166271653 is an apocalyptic number.

It is an amenable number.

166271653 is a deficient number, since it is larger than the sum of its proper divisors (3137255).

166271653 is an equidigital number, since it uses as much as digits as its factorization.

166271653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137254.

The product of its digits is 45360, while the sum is 37.

The square root of 166271653 is about 12894.6365982140. The cubic root of 166271653 is about 549.8860954203.

The spelling of 166271653 in words is "one hundred sixty-six million, two hundred seventy-one thousand, six hundred fifty-three".