666335633 has 4 divisors (see below), whose sum is σ = 666451428. Its totient is φ = 666219840.

The previous prime is 666335597. The next prime is 666335647. The reversal of 666335633 is 336533666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 588402049 + 77933584 = 24257^2 + 8828^2 .

It is a cyclic number.

It is not a de Polignac number, because 666335633 - 2¹² = 666331537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666335653) 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, 48788 + ... + 60933.

It is an arithmetic number, because the mean of its divisors is an integer number (166612857).

Almost surely, 2^666335633 is an apocalyptic number.

It is an amenable number.

666335633 is a deficient number, since it is larger than the sum of its proper divisors (115795).

666335633 is a wasteful number, since it uses less digits than its factorization.

666335633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115794.

The product of its digits is 524880, while the sum is 41.

The square root of 666335633 is about 25813.4777393516. The cubic root of 666335633 is about 873.4358485251.

The spelling of 666335633 in words is "six hundred sixty-six million, three hundred thirty-five thousand, six hundred thirty-three".