665373482880 has 256 divisors, whose sum is σ = 2247891912000. Its totient is φ = 166827917312.

The previous prime is 665373482869. The next prime is 665373482899. The reversal of 665373482880 is 88284373566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34229644 + ... + 34249076.

Almost surely, 2^665373482880 is an apocalyptic number.

665373482880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665373482880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1123945956000).

665373482880 is an abundant number, since it is smaller than the sum of its proper divisors (1582518429120).

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

665373482880 is a wasteful number, since it uses less digits than its factorization.

665373482880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20521 (or 20509 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 60.

The spelling of 665373482880 in words is "six hundred sixty-five billion, three hundred seventy-three million, four hundred eighty-two thousand, eight hundred eighty".