664974270240 has 384 divisors, whose sum is σ = 2454851266560. Its totient is φ = 148132454400.

The previous prime is 664974270229. The next prime is 664974270251. The reversal of 664974270240 is 42072479466.

It is an interprime number because it is at equal distance from previous prime (664974270229) and next prime (664974270251).

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 63 ways as a sum of consecutive naturals, for example, 177846291 + ... + 177850029.

It is an arithmetic number, because the mean of its divisors is an integer number (6392841840).

Almost surely, 2^664974270240 is an apocalyptic number.

664974270240 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 664974270240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1227425633280).

664974270240 is an abundant number, since it is smaller than the sum of its proper divisors (1789876996320).

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

664974270240 is a wasteful number, since it uses less digits than its factorization.

664974270240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096 (or 5088 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 664974270240 in words is "six hundred sixty-four billion, nine hundred seventy-four million, two hundred seventy thousand, two hundred forty".