660651460 has 96 divisors (see below), whose sum is σ = 1623121920. Its totient is φ = 221211648.

The previous prime is 660651457. The next prime is 660651461. The reversal of 660651460 is 64156066.

660651460 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (660651461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1297686 + ... + 1298194.

It is an arithmetic number, because the mean of its divisors is an integer number (16907520).

Almost surely, 2^660651460 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 660651460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811560960).

660651460 is an abundant number, since it is smaller than the sum of its proper divisors (962470460).

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

660651460 is a wasteful number, since it uses less digits than its factorization.

660651460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 660651460 is about 25703.1410531865. The cubic root of 660651460 is about 870.9451392406.

The spelling of 660651460 in words is "six hundred sixty million, six hundred fifty-one thousand, four hundred sixty".