866786274780403 has 32 divisors (see below), whose sum is σ = 959926767004800. Its totient is φ = 778496256147456.

The previous prime is 866786274780313. The next prime is 866786274780509. The reversal of 866786274780403 is 304087472687668.

It is a cyclic number.

It is not a de Polignac number, because 866786274780403 - 2¹⁷ = 866786274649331 is a prime.

It is a super-2 number, since 2×866786274780403² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866786274780403.

It is not an unprimeable number, because it can be changed into a prime (866786274780703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4982331003 + ... + 4982504971.

It is an arithmetic number, because the mean of its divisors is an integer number (29997711468900).

Almost surely, 2^{866786274780403} is an apocalyptic number.

866786274780403 is a deficient number, since it is larger than the sum of its proper divisors (93140492224397).

866786274780403 is a wasteful number, since it uses less digits than its factorization.

866786274780403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203871.

The product of its (nonzero) digits is 3641573376, while the sum is 76.

The spelling of 866786274780403 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-four million, seven hundred eighty thousand, four hundred three".