664368980424240 has 1920 divisors, whose sum is σ = 2700380124610560. Its totient is φ = 132120524390400.

The previous prime is 664368980424197. The next prime is 664368980424319. The reversal of 664368980424240 is 42424089863466.

It is a super-2 number, since 2×664368980424240² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 51867350956 + ... + 51867363764.

It is an arithmetic number, because the mean of its divisors is an integer number (1406447981568).

Almost surely, 2^{664368980424240} is an apocalyptic number.

664368980424240 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 664368980424240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350190062305280).

664368980424240 is an abundant number, since it is smaller than the sum of its proper divisors (2036011144186320).

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

664368980424240 is a wasteful number, since it uses less digits than its factorization.

664368980424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13043 (or 13024 counting only the distinct ones).

The product of its (nonzero) digits is 382205952, while the sum is 66.

The spelling of 664368980424240 in words is "six hundred sixty-four trillion, three hundred sixty-eight billion, nine hundred eighty million, four hundred twenty-four thousand, two hundred forty".