660323040 has 384 divisors, whose sum is σ = 2400451200. Its totient is φ = 151388160.

The previous prime is 660323029. The next prime is 660323047. The reversal of 660323040 is 40323066.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 660323040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660323047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7419316 + ... + 7419404.

It is an arithmetic number, because the mean of its divisors is an integer number (6251175).

Almost surely, 2^660323040 is an apocalyptic number.

660323040 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 660323040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200225600).

660323040 is an abundant number, since it is smaller than the sum of its proper divisors (1740128160).

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

660323040 is a wasteful number, since it uses less digits than its factorization.

660323040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 660323040 is about 25696.7515456721. The cubic root of 660323040 is about 870.8007952455.

The spelling of 660323040 in words is "six hundred sixty million, three hundred twenty-three thousand, forty".