660666652 has 12 divisors (see below), whose sum is σ = 1162555576. Its totient is φ = 328507920.

The previous prime is 660666649. The next prime is 660666653. The reversal of 660666652 is 256666066.

660666652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 660666599 and 660666608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660666653) 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, 455538 + ... + 456985.

Almost surely, 2^660666652 is an apocalyptic number.

It is an amenable number.

660666652 is a deficient number, since it is larger than the sum of its proper divisors (501888924).

660666652 is a wasteful number, since it uses less digits than its factorization.

660666652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912708 (or 912706 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 660666652 is about 25703.4365795704. The cubic root of 660666652 is about 870.9518151244.

The spelling of 660666652 in words is "six hundred sixty million, six hundred sixty-six thousand, six hundred fifty-two".