660766340 has 36 divisors (see below), whose sum is σ = 1502566884. Its totient is φ = 243974016.

The previous prime is 660766307. The next prime is 660766357. The reversal of 660766340 is 43667066.

660766340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 355775044 + 304991296 = 18862^2 + 17464^2 .

It is a super-2 number, since 2×660766340² = 873224312153991200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660766294 and 660766303.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94367 + ... + 101126.

It is an arithmetic number, because the mean of its divisors is an integer number (41737969).

Almost surely, 2^660766340 is an apocalyptic number.

It is an amenable number.

660766340 is an abundant number, since it is smaller than the sum of its proper divisors (841800544).

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

660766340 is a wasteful number, since it uses less digits than its factorization.

660766340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195528 (or 195513 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 660766340 is about 25705.3757023701. The cubic root of 660766340 is about 870.9956188983.

The spelling of 660766340 in words is "six hundred sixty million, seven hundred sixty-six thousand, three hundred forty".