6366630665 has 4 divisors (see below), whose sum is σ = 7639956804. Its totient is φ = 5093304528.

The previous prime is 6366630661. The next prime is 6366630689. The reversal of 6366630665 is 5660366636.

6366630665 is digitally balanced in base 3, 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 can be written as a sum of positive squares in 2 ways, for example, as 1699418176 + 4667212489 = 41224^2 + 68317^2 .

It is a cyclic number.

It is not a de Polignac number, because 6366630665 - 2² = 6366630661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6366630661) 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, 636663062 + ... + 636663071.

It is an arithmetic number, because the mean of its divisors is an integer number (1909989201).

Almost surely, 2^6366630665 is an apocalyptic number.

It is an amenable number.

6366630665 is a deficient number, since it is larger than the sum of its proper divisors (1273326139).

6366630665 is a wasteful number, since it uses less digits than its factorization.

6366630665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273326138.

The product of its (nonzero) digits is 2099520, while the sum is 47.

The square root of 6366630665 is about 79791.1690915730. The cubic root of 6366630665 is about 1853.4031020660.

The spelling of 6366630665 in words is "six billion, three hundred sixty-six million, six hundred thirty thousand, six hundred sixty-five".