6501500666597 has 4 divisors (see below), whose sum is σ = 6501635827680. Its totient is φ = 6501365505516.

The previous prime is 6501500666587. The next prime is 6501500666623. The reversal of 6501500666597 is 7956660051056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6501500666597 - 2¹⁴ = 6501500650213 is a prime.

It is a super-2 number, since 2×6501500666597² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501500666587) 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, 67508363 + ... + 67604600.

It is an arithmetic number, because the mean of its divisors is an integer number (1625408956920).

Almost surely, 2^{6501500666597} is an apocalyptic number.

It is an amenable number.

6501500666597 is a deficient number, since it is larger than the sum of its proper divisors (135161083).

6501500666597 is a wasteful number, since it uses less digits than its factorization.

6501500666597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135161082.

The product of its (nonzero) digits is 10206000, while the sum is 56.

The spelling of 6501500666597 in words is "six trillion, five hundred one billion, five hundred million, six hundred sixty-six thousand, five hundred ninety-seven".