866786514037026 has 128 divisors (see below), whose sum is σ = 2115307319178240. Its totient is φ = 233367234508800.

The previous prime is 866786514037021. The next prime is 866786514037051. The reversal of 866786514037026 is 620730415687668.

It is not an unprimeable number, because it can be changed into a prime (866786514037021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66358116 + ... + 78338831.

It is an arithmetic number, because the mean of its divisors is an integer number (16525838431080).

Almost surely, 2^{866786514037026} is an apocalyptic number.

866786514037026 is an abundant number, since it is smaller than the sum of its proper divisors (1248520805141214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866786514037026 is a wasteful number, since it uses less digits than its factorization.

866786514037026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144697280.

The product of its (nonzero) digits is 487710720, while the sum is 69.

The spelling of 866786514037026 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred fourteen million, thirty-seven thousand, twenty-six".