665001956153760 has 384 divisors, whose sum is σ = 2194064411148288. Its totient is φ = 169097542656000.

The previous prime is 665001956153707. The next prime is 665001956153803. The reversal of 665001956153760 is 67351659100566.

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

It is a junction number, because it is equal to n+sod(n) for n = 665001956153694 and 665001956153703.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1818019207 + ... + 1818384953.

It is an arithmetic number, because the mean of its divisors is an integer number (5713709404032).

Almost surely, 2^{665001956153760} is an apocalyptic number.

665001956153760 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 665001956153760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097032205574144).

665001956153760 is an abundant number, since it is smaller than the sum of its proper divisors (1529062454994528).

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

665001956153760 is a wasteful number, since it uses less digits than its factorization.

665001956153760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367588 (or 367580 counting only the distinct ones).

The product of its (nonzero) digits is 30618000, while the sum is 60.

The spelling of 665001956153760 in words is "six hundred sixty-five trillion, one billion, nine hundred fifty-six million, one hundred fifty-three thousand, seven hundred sixty".