666272523 has 16 divisors (see below), whose sum is σ = 1019713280. Its totient is φ = 379061856.

The previous prime is 666272507. The next prime is 666272539. The reversal of 666272523 is 325272666.

It is a happy number.

666272523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666272507) and next prime (666272539).

It is not a de Polignac number, because 666272523 - 2⁴ = 666272507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666272323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64465 + ... + 74082.

It is an arithmetic number, because the mean of its divisors is an integer number (63732080).

Almost surely, 2^666272523 is an apocalyptic number.

666272523 is a deficient number, since it is larger than the sum of its proper divisors (353440757).

666272523 is a wasteful number, since it uses less digits than its factorization.

666272523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138786.

The product of its digits is 181440, while the sum is 39.

The square root of 666272523 is about 25812.2552869756. The cubic root of 666272523 is about 873.4082726939.

The spelling of 666272523 in words is "six hundred sixty-six million, two hundred seventy-two thousand, five hundred twenty-three".