660730936320 has 1408 divisors, whose sum is σ = 2947491348480. Its totient is φ = 136638627840.

The previous prime is 660730936309. The next prime is 660730936357. The reversal of 660730936320 is 23639037066.

660730936320 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 3 + 0 + 9 + 3 + 632 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 666731025 + ... + 666732015.

Almost surely, 2^660730936320 is an apocalyptic number.

660730936320 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 660730936320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473745674240).

660730936320 is an abundant number, since it is smaller than the sum of its proper divisors (2286760412160).

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

660730936320 is a wasteful number, since it uses less digits than its factorization.

660730936320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 45.

The spelling of 660730936320 in words is "six hundred sixty billion, seven hundred thirty million, nine hundred thirty-six thousand, three hundred twenty".