665114849280 has 624 divisors, whose sum is σ = 2645732841024. Its totient is φ = 151396024320.

The previous prime is 665114849261. The next prime is 665114849291. The reversal of 665114849280 is 82948411566.

665114849280 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 148 + 492 + 8 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 357395550 + ... + 357397410.

It is an arithmetic number, because the mean of its divisors is an integer number (4239956476).

Almost surely, 2^665114849280 is an apocalyptic number.

665114849280 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 665114849280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322866420512).

665114849280 is an abundant number, since it is smaller than the sum of its proper divisors (1980617991744).

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

665114849280 is a wasteful number, since it uses less digits than its factorization.

665114849280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2155 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 665114849280 in words is "six hundred sixty-five billion, one hundred fourteen million, eight hundred forty-nine thousand, two hundred eighty".