166749523 has 4 divisors (see below), whose sum is σ = 167318928. Its totient is φ = 166180120.

The previous prime is 166749521. The next prime is 166749547. The reversal of 166749523 is 325947661.

166749523 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 is a cyclic number.

It is not a de Polignac number, because 166749523 - 2¹ = 166749521 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 166749523.

It is not an unprimeable number, because it can be changed into a prime (166749521) 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, 284263 + ... + 284848.

It is an arithmetic number, because the mean of its divisors is an integer number (41829732).

Almost surely, 2^166749523 is an apocalyptic number.

166749523 is a deficient number, since it is larger than the sum of its proper divisors (569405).

166749523 is an equidigital number, since it uses as much as digits as its factorization.

166749523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569404.

The product of its digits is 272160, while the sum is 43.

The square root of 166749523 is about 12913.1531006180. The cubic root of 166749523 is about 550.4123882360.

The spelling of 166749523 in words is "one hundred sixty-six million, seven hundred forty-nine thousand, five hundred twenty-three".