63870020650866 has 128 divisors (see below), whose sum is σ = 132899097931776. Its totient is φ = 20448351221760.

The previous prime is 63870020650783. The next prime is 63870020650867. The reversal of 63870020650866 is 66805602007836.

It is not an unprimeable number, because it can be changed into a prime (63870020650867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14726772250 + ... + 14726776586.

It is an arithmetic number, because the mean of its divisors is an integer number (1038274202592).

Almost surely, 2^{63870020650866} is an apocalyptic number.

63870020650866 is an abundant number, since it is smaller than the sum of its proper divisors (69029077280910).

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

63870020650866 is a wasteful number, since it uses less digits than its factorization.

63870020650866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376.

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 63870020650866 in words is "sixty-three trillion, eight hundred seventy billion, twenty million, six hundred fifty thousand, eight hundred sixty-six".