6690204665 has 32 divisors (see below), whose sum is σ = 8757196800. Its totient is φ = 4889626560.

The previous prime is 6690204593. The next prime is 6690204673. The reversal of 6690204665 is 5664020966.

It is a de Polignac number, because none of the positive numbers 2^k-6690204665 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312350 + ... + 333080.

It is an arithmetic number, because the mean of its divisors is an integer number (273662400).

Almost surely, 2^6690204665 is an apocalyptic number.

It is an amenable number.

6690204665 is a deficient number, since it is larger than the sum of its proper divisors (2066992135).

6690204665 is a wasteful number, since it uses less digits than its factorization.

6690204665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20877.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 6690204665 is about 81793.6713016356. The cubic root of 6690204665 is about 1884.2844664657.

The spelling of 6690204665 in words is "six billion, six hundred ninety million, two hundred four thousand, six hundred sixty-five".