6667565500665 has 216 divisors, whose sum is σ = 12829382616960. Its totient is φ = 3317200869312.

The previous prime is 6667565500657. The next prime is 6667565500693. The reversal of 6667565500665 is 5660055657666.

It is a happy number.

It is not a de Polignac number, because 6667565500665 - 2³ = 6667565500657 is a prime.

It is a super-2 number, since 2×6667565500665² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 2797970064 + ... + 2797972446.

Almost surely, 2^{6667565500665} is an apocalyptic number.

It is an amenable number.

6667565500665 is a deficient number, since it is larger than the sum of its proper divisors (6161817116295).

6667565500665 is an frugal number, since it uses more digits than its factorization.

6667565500665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565 (or 2477 counting only the distinct ones).

The product of its (nonzero) digits is 204120000, while the sum is 63.

The spelling of 6667565500665 in words is "six trillion, six hundred sixty-seven billion, five hundred sixty-five million, five hundred thousand, six hundred sixty-five".