666272026 has 32 divisors (see below), whose sum is σ = 1188126720. Its totient is φ = 274201200.

The previous prime is 666271997. The next prime is 666272059. The reversal of 666272026 is 620272666.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50995 + ... + 62713.

It is an arithmetic number, because the mean of its divisors is an integer number (37128960).

Almost surely, 2^666272026 is an apocalyptic number.

666272026 is a deficient number, since it is larger than the sum of its proper divisors (521854694).

666272026 is a wasteful number, since it uses less digits than its factorization.

666272026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11890.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 666272026 is about 25812.2456597639. The cubic root of 666272026 is about 873.4080555235.

The spelling of 666272026 in words is "six hundred sixty-six million, two hundred seventy-two thousand, twenty-six".