166245253 has 4 divisors (see below), whose sum is σ = 167458860. Its totient is φ = 165031648.

The previous prime is 166245241. The next prime is 166245257. The reversal of 166245253 is 352542661.

166245253 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 an emirpimes, since its reverse is a distinct semiprime: 352542661 = 4019 ⋅87719.

It can be written as a sum of positive squares in 2 ways, for example, as 40424164 + 125821089 = 6358^2 + 11217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166245253 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 (166245257) 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, 606598 + ... + 606871.

It is an arithmetic number, because the mean of its divisors is an integer number (41864715).

Almost surely, 2^166245253 is an apocalyptic number.

It is an amenable number.

166245253 is a deficient number, since it is larger than the sum of its proper divisors (1213607).

166245253 is a wasteful number, since it uses less digits than its factorization.

166245253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213606.

The product of its digits is 43200, while the sum is 34.

The square root of 166245253 is about 12893.6128761492. The cubic root of 166245253 is about 549.8569909177.

The spelling of 166245253 in words is "one hundred sixty-six million, two hundred forty-five thousand, two hundred fifty-three".