866786004048526 has 16 divisors (see below), whose sum is σ = 1371784908130560. Its totient is φ = 409630215606840.

The previous prime is 866786004048457. The next prime is 866786004048527. The reversal of 866786004048526 is 625840400687668.

It is a happy number.

It is a super-2 number, since 2×866786004048526² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786004048527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26461883856 + ... + 26461916611.

It is an arithmetic number, because the mean of its divisors is an integer number (85736556758160).

Almost surely, 2^{866786004048526} is an apocalyptic number.

866786004048526 is a deficient number, since it is larger than the sum of its proper divisors (504998904082034).

866786004048526 is a wasteful number, since it uses less digits than its factorization.

866786004048526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52923800919.

The product of its (nonzero) digits is 743178240, while the sum is 70.

The spelling of 866786004048526 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four million, forty-eight thousand, five hundred twenty-six".