660768 has 24 divisors (see below), whose sum is σ = 1734768. Its totient is φ = 220224.

The previous prime is 660757. The next prime is 660769. The reversal of 660768 is 867066.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×660768² = 873228699648, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660768.

It is not an unprimeable number, because it can be changed into a prime (660769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3346 + ... + 3537.

It is an arithmetic number, because the mean of its divisors is an integer number (72282).

2⁶⁶⁰⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

660768 is an abundant number, since it is smaller than the sum of its proper divisors (1074000).

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

660768 is a wasteful number, since it uses less digits than its factorization.

660768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6896 (or 6888 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 660768 is about 812.8763743645. The cubic root of 660768 is about 87.0996348279.

The spelling of 660768 in words is "six hundred sixty thousand, seven hundred sixty-eight".