663797573220 has 48 divisors (see below), whose sum is σ = 1956456008640. Its totient is φ = 167696228736.

The previous prime is 663797573213. The next prime is 663797573267. The reversal of 663797573220 is 22375797366.

It is a super-2 number, since 2×663797573220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291138147 + ... + 291140426.

It is an arithmetic number, because the mean of its divisors is an integer number (40759500180).

Almost surely, 2^663797573220 is an apocalyptic number.

663797573220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663797573220 is an abundant number, since it is smaller than the sum of its proper divisors (1292658435420).

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

663797573220 is a wasteful number, since it uses less digits than its factorization.

663797573220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582278604 (or 582278602 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 57.

The spelling of 663797573220 in words is "six hundred sixty-three billion, seven hundred ninety-seven million, five hundred seventy-three thousand, two hundred twenty".