255813321066 has 16 divisors (see below), whose sum is σ = 512170358688. Its totient is φ = 85180487600.

The previous prime is 255813321047. The next prime is 255813321067. The reversal of 255813321066 is 660123318552.

It is not an unprimeable number, because it can be changed into a prime (255813321067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22648740 + ... + 22660031.

It is an arithmetic number, because the mean of its divisors is an integer number (32010647418).

Almost surely, 2^255813321066 is an apocalyptic number.

255813321066 is an abundant number, since it is smaller than the sum of its proper divisors (256357037622).

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

255813321066 is a wasteful number, since it uses less digits than its factorization.

255813321066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45309717.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 255813321066 in words is "two hundred fifty-five billion, eight hundred thirteen million, three hundred twenty-one thousand, sixty-six".