665541423711360 has 768 divisors, whose sum is σ = 2741139584951040. Its totient is φ = 151154774065152.

The previous prime is 665541423711337. The next prime is 665541423711389. The reversal of 665541423711360 is 63117324145566.

665541423711360 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 41 + 4 + 237 + 1 + 1 + 360 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 665541423711297 and 665541423711306.

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 95 ways as a sum of consecutive naturals, for example, 168969502 + ... + 172863458.

It is an arithmetic number, because the mean of its divisors is an integer number (3569192167905).

Almost surely, 2^{665541423711360} is an apocalyptic number.

665541423711360 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 665541423711360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370569792475520).

665541423711360 is an abundant number, since it is smaller than the sum of its proper divisors (2075598161239680).

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

665541423711360 is a wasteful number, since it uses less digits than its factorization.

665541423711360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894155 (or 3894131 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 665541423711360 in words is "six hundred sixty-five trillion, five hundred forty-one billion, four hundred twenty-three million, seven hundred eleven thousand, three hundred sixty".