666304653 has 32 divisors (see below), whose sum is σ = 1054432512. Its totient is φ = 366336000.

The previous prime is 666304649. The next prime is 666304693. The reversal of 666304653 is 356403666.

It is a happy number.

It is not a de Polignac number, because 666304653 - 2² = 666304649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666304633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57553 + ... + 68153.

It is an arithmetic number, because the mean of its divisors is an integer number (32951016).

Almost surely, 2^666304653 is an apocalyptic number.

It is an amenable number.

666304653 is a deficient number, since it is larger than the sum of its proper divisors (388127859).

666304653 is a wasteful number, since it uses less digits than its factorization.

666304653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725.

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 666304653 is about 25812.8776582542. The cubic root of 666304653 is about 873.4223120725.

The spelling of 666304653 in words is "six hundred sixty-six million, three hundred four thousand, six hundred fifty-three".