663321475860 has 72 divisors (see below), whose sum is σ = 1923553553376. Its totient is φ = 170786206080.

The previous prime is 663321475849. The next prime is 663321475867. The reversal of 663321475860 is 68574123366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663321475867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6522286 + ... + 6623205.

Almost surely, 2^663321475860 is an apocalyptic number.

663321475860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663321475860 is an abundant number, since it is smaller than the sum of its proper divisors (1260232077516).

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

663321475860 is a wasteful number, since it uses less digits than its factorization.

663321475860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13145561 (or 13145530 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 663321475860 in words is "six hundred sixty-three billion, three hundred twenty-one million, four hundred seventy-five thousand, eight hundred sixty".