664034280 has 512 divisors, whose sum is σ = 2685312000. Its totient is φ = 130056192.

The previous prime is 664034233. The next prime is 664034299. The reversal of 664034280 is 82430466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9096324 + ... + 9096396.

It is an arithmetic number, because the mean of its divisors is an integer number (5244750).

Almost surely, 2^664034280 is an apocalyptic number.

664034280 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 664034280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342656000).

664034280 is an abundant number, since it is smaller than the sum of its proper divisors (2021277720).

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

664034280 is a wasteful number, since it uses less digits than its factorization.

664034280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 664034280 is about 25768.8626058660. The cubic root of 664034280 is about 872.4291472638.

The spelling of 664034280 in words is "six hundred sixty-four million, thirty-four thousand, two hundred eighty".