664452600 has 192 divisors, whose sum is σ = 2366634240. Its totient is φ = 151065600.

The previous prime is 664452571. The next prime is 664452653. The reversal of 664452600 is 6254466.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 1179919 + ... + 1180481.

It is an arithmetic number, because the mean of its divisors is an integer number (12326220).

Almost surely, 2^664452600 is an apocalyptic number.

664452600 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 664452600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1183317120).

664452600 is an abundant number, since it is smaller than the sum of its proper divisors (1702181640).

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

664452600 is a wasteful number, since it uses less digits than its factorization.

664452600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 664452600 is about 25776.9781006230. The cubic root of 664452600 is about 872.6123094700.

The spelling of 664452600 in words is "six hundred sixty-four million, four hundred fifty-two thousand, six hundred".