866130642648636 has 96 divisors (see below), whose sum is σ = 2151488079003648. Its totient is φ = 270750562649280.

The previous prime is 866130642648631. The next prime is 866130642648653. The reversal of 866130642648636 is 636846246031668.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866130642648631) 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, 211144500 + ... + 215207483.

It is an arithmetic number, because the mean of its divisors is an integer number (22411334156288).

Almost surely, 2^{866130642648636} is an apocalyptic number.

866130642648636 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

866130642648636 is an abundant number, since it is smaller than the sum of its proper divisors (1285357436355012).

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

866130642648636 is a wasteful number, since it uses less digits than its factorization.

866130642648636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426352191 (or 426352189 counting only the distinct ones).

The product of its (nonzero) digits is 859963392, while the sum is 69.

The spelling of 866130642648636 in words is "eight hundred sixty-six trillion, one hundred thirty billion, six hundred forty-two million, six hundred forty-eight thousand, six hundred thirty-six".