660619072512 has 528 divisors, whose sum is σ = 2301843312000. Its totient is φ = 186593476608.

The previous prime is 660619072507. The next prime is 660619072513. The reversal of 660619072512 is 215270916066.

660619072512 is a `hidden beast` number, since 6 + 6 + 0 + 61 + 9 + 0 + 72 + 512 = 666.

It is a super-2 number, since 2×660619072512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660619072513) by changing a digit.

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, 120570189 + ... + 120575667.

Almost surely, 2^660619072512 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 660619072512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1150921656000).

660619072512 is an abundant number, since it is smaller than the sum of its proper divisors (1641224239488).

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

660619072512 is a wasteful number, since it uses less digits than its factorization.

660619072512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611 (or 5580 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

Adding to 660619072512 its reverse (215270916066), we get a palindrome (875889988578).

The spelling of 660619072512 in words is "six hundred sixty billion, six hundred nineteen million, seventy-two thousand, five hundred twelve".