6566897901695 has 8 divisors (see below), whose sum is σ = 7880371366560. Its totient is φ = 5253455731680.

The previous prime is 6566897901689. The next prime is 6566897901703. The reversal of 6566897901695 is 5961097986656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6566897901695 - 2²⁸ = 6566629466239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7359560 + ... + 8203469.

It is an arithmetic number, because the mean of its divisors is an integer number (985046420820).

Almost surely, 2^{6566897901695} is an apocalyptic number.

6566897901695 is a deficient number, since it is larger than the sum of its proper divisors (1313473464865).

6566897901695 is a wasteful number, since it uses less digits than its factorization.

6566897901695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15647425.

The product of its (nonzero) digits is 1322697600, while the sum is 77.

The spelling of 6566897901695 in words is "six trillion, five hundred sixty-six billion, eight hundred ninety-seven million, nine hundred one thousand, six hundred ninety-five".