660250320 has 80 divisors (see below), whose sum is σ = 2054219712. Its totient is φ = 175426560.

The previous prime is 660250277. The next prime is 660250363. The reversal of 660250320 is 23052066.

It is an interprime number because it is at equal distance from previous prime (660250277) and next prime (660250363).

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63060 + ... + 72780.

Almost surely, 2^660250320 is an apocalyptic number.

660250320 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 660250320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027109856).

660250320 is an abundant number, since it is smaller than the sum of its proper divisors (1393969392).

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

660250320 is a wasteful number, since it uses less digits than its factorization.

660250320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020 (or 10014 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 660250320 is about 25695.3365418708. The cubic root of 660250320 is about 870.7688275798.

The spelling of 660250320 in words is "six hundred sixty million, two hundred fifty thousand, three hundred twenty".