660322572 has 192 divisors, whose sum is σ = 1987722240. Its totient is φ = 165970944.

The previous prime is 660322567. The next prime is 660322591. The reversal of 660322572 is 275223066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2383698 + ... + 2383974.

It is an arithmetic number, because the mean of its divisors is an integer number (10352720).

Almost surely, 2^660322572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660322572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993861120).

660322572 is an abundant number, since it is smaller than the sum of its proper divisors (1327399668).

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

660322572 is a wasteful number, since it uses less digits than its factorization.

660322572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 660322572 is about 25696.7424394611. The cubic root of 660322572 is about 870.8005895205.

The spelling of 660322572 in words is "six hundred sixty million, three hundred twenty-two thousand, five hundred seventy-two".