866359856802 has 32 divisors (see below), whose sum is σ = 1892186521344. Its totient is φ = 262262896400.

The previous prime is 866359856797. The next prime is 866359856807. The reversal of 866359856802 is 208658953668.

It is an interprime number because it is at equal distance from previous prime (866359856797) and next prime (866359856807).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (866359856807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6695268 + ... + 6823439.

It is an arithmetic number, because the mean of its divisors is an integer number (59130828792).

Almost surely, 2^866359856802 is an apocalyptic number.

866359856802 is an abundant number, since it is smaller than the sum of its proper divisors (1025826664542).

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

866359856802 is a wasteful number, since it uses less digits than its factorization.

866359856802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519694.

The product of its (nonzero) digits is 149299200, while the sum is 66.

The spelling of 866359856802 in words is "eight hundred sixty-six billion, three hundred fifty-nine million, eight hundred fifty-six thousand, eight hundred two".