660636003720 has 256 divisors, whose sum is σ = 2479691335680. Its totient is φ = 136789401600.

The previous prime is 660636003683. The next prime is 660636003739. The reversal of 660636003720 is 27300636066.

660636003720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×660636003720² (a number of 24 digits) contains 22 as substring.

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, 2488600 + ... + 2741240.

It is an arithmetic number, because the mean of its divisors is an integer number (9686294280).

Almost surely, 2^660636003720 is an apocalyptic number.

660636003720 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 660636003720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239845667840).

660636003720 is an abundant number, since it is smaller than the sum of its proper divisors (1819055331960).

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

660636003720 is a wasteful number, since it uses less digits than its factorization.

660636003720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252956 (or 252952 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 39.

Adding to 660636003720 its reverse (27300636066), we get a palindrome (687936639786).

The spelling of 660636003720 in words is "six hundred sixty billion, six hundred thirty-six million, three thousand, seven hundred twenty".