166253533 has 4 divisors (see below), whose sum is σ = 166435360. Its totient is φ = 166071708.

The previous prime is 166253501. The next prime is 166253537. The reversal of 166253533 is 335352661.

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 166253533 - 2⁵ = 166253501 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 (166253537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89535 + ... + 91372.

It is an arithmetic number, because the mean of its divisors is an integer number (41608840).

Almost surely, 2^166253533 is an apocalyptic number.

It is an amenable number.

166253533 is a deficient number, since it is larger than the sum of its proper divisors (181827).

166253533 is an equidigital number, since it uses as much as digits as its factorization.

166253533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181826.

The product of its digits is 48600, while the sum is 34.

The square root of 166253533 is about 12893.9339613634. The cubic root of 166253533 is about 549.8661194797.

The spelling of 166253533 in words is "one hundred sixty-six million, two hundred fifty-three thousand, five hundred thirty-three".