660781896 has 16 divisors (see below), whose sum is σ = 1651954800. Its totient is φ = 220260624.

The previous prime is 660781861. The next prime is 660781921. The reversal of 660781896 is 698187066.

It is a happy number.

660781896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13766266 + ... + 13766313.

It is an arithmetic number, because the mean of its divisors is an integer number (103247175).

Almost surely, 2^660781896 is an apocalyptic number.

It is an amenable number.

660781896 is an abundant number, since it is smaller than the sum of its proper divisors (991172904).

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

660781896 is a wasteful number, since it uses less digits than its factorization.

660781896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27532588 (or 27532584 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 660781896 is about 25705.6782832121. The cubic root of 660781896 is about 871.0024539425.

The spelling of 660781896 in words is "six hundred sixty million, seven hundred eighty-one thousand, eight hundred ninety-six".