866786028406133 has 4 divisors (see below), whose sum is σ = 945584758261248. Its totient is φ = 787987298551020.

The previous prime is 866786028406099. The next prime is 866786028406159. The reversal of 866786028406133 is 331604820687668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866786028406133 - 2²⁸ = 866785759970677 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 (866786028406183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39399364927541 + ... + 39399364927562.

It is an arithmetic number, because the mean of its divisors is an integer number (236396189565312).

Almost surely, 2^{866786028406133} is an apocalyptic number.

It is an amenable number.

866786028406133 is a deficient number, since it is larger than the sum of its proper divisors (78798729855115).

866786028406133 is a wasteful number, since it uses less digits than its factorization.

866786028406133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78798729855114.

The product of its (nonzero) digits is 334430208, while the sum is 68.

The spelling of 866786028406133 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, twenty-eight million, four hundred six thousand, one hundred thirty-three".