866443821285702 has 64 divisors (see below), whose sum is σ = 1993906638720000. Its totient is φ = 248241376162080.

The previous prime is 866443821285673. The next prime is 866443821285751. The reversal of 866443821285702 is 207582128344668.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691702948 + ... + 692954439.

It is an arithmetic number, because the mean of its divisors is an integer number (31154791230000).

Almost surely, 2^{866443821285702} is an apocalyptic number.

866443821285702 is an abundant number, since it is smaller than the sum of its proper divisors (1127462817434298).

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

866443821285702 is a wasteful number, since it uses less digits than its factorization.

866443821285702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384657921.

The product of its (nonzero) digits is 247726080, while the sum is 66.

The spelling of 866443821285702 in words is "eight hundred sixty-six trillion, four hundred forty-three billion, eight hundred twenty-one million, two hundred eighty-five thousand, seven hundred two".