866158224600647 has 16 divisors (see below), whose sum is σ = 956316352942080. Its totient is φ = 777936518436000.

The previous prime is 866158224600637. The next prime is 866158224600749. The reversal of 866158224600647 is 746006422851668.

It is not a de Polignac number, because 866158224600647 - 2¹⁸ = 866158224338503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866158224600637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 841408247 + ... + 842437032.

It is an arithmetic number, because the mean of its divisors is an integer number (59769772058880).

Almost surely, 2^{866158224600647} is an apocalyptic number.

866158224600647 is a deficient number, since it is larger than the sum of its proper divisors (90158128341433).

866158224600647 is a wasteful number, since it uses less digits than its factorization.

866158224600647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683845854.

The product of its (nonzero) digits is 185794560, while the sum is 65.

The spelling of 866158224600647 in words is "eight hundred sixty-six trillion, one hundred fifty-eight billion, two hundred twenty-four million, six hundred thousand, six hundred forty-seven".