166043253 has 8 divisors (see below), whose sum is σ = 226539808. Its totient is φ = 108121104.

The previous prime is 166043203. The next prime is 166043263. The reversal of 166043253 is 352340661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166043253 - 2⁹ = 166042741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166043253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166043203) 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 7 ways as a sum of consecutive naturals, for example, 643450 + ... + 643707.

It is an arithmetic number, because the mean of its divisors is an integer number (28317476).

Almost surely, 2^166043253 is an apocalyptic number.

It is an amenable number.

166043253 is a deficient number, since it is larger than the sum of its proper divisors (60496555).

166043253 is a wasteful number, since it uses less digits than its factorization.

166043253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287203.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 166043253 is about 12885.7771593335. Note that the first 3 decimals coincide. The cubic root of 166043253 is about 549.6341953250.

The spelling of 166043253 in words is "one hundred sixty-six million, forty-three thousand, two hundred fifty-three".