866713492893 has 4 divisors (see below), whose sum is σ = 1155617990528. Its totient is φ = 577808995260.

The previous prime is 866713492873. The next prime is 866713492903. The reversal of 866713492893 is 398294317668.

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 not a de Polignac number, because 866713492893 - 2⁵ = 866713492861 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 (866713492873) 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, 144452248813 + ... + 144452248818.

It is an arithmetic number, because the mean of its divisors is an integer number (288904497632).

Almost surely, 2^866713492893 is an apocalyptic number.

It is an amenable number.

866713492893 is a deficient number, since it is larger than the sum of its proper divisors (288904497635).

866713492893 is a wasteful number, since it uses less digits than its factorization.

866713492893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288904497634.

The product of its digits is 94058496, while the sum is 66.

The spelling of 866713492893 in words is "eight hundred sixty-six billion, seven hundred thirteen million, four hundred ninety-two thousand, eight hundred ninety-three".