660787507 has 2 divisors, whose sum is σ = 660787508. Its totient is φ = 660787506.

The previous prime is 660787499. The next prime is 660787511. The reversal of 660787507 is 705787066.

660787507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660787507 - 2³ = 660787499 is a prime.

It is not a weakly prime, because it can be changed into another prime (660787577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330393753 + 330393754.

It is an arithmetic number, because the mean of its divisors is an integer number (330393754).

Almost surely, 2^660787507 is an apocalyptic number.

660787507 is a deficient number, since it is larger than the sum of its proper divisors (1).

660787507 is an equidigital number, since it uses as much as digits as its factorization.

660787507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 660787507 is about 25705.7874222907. The cubic root of 660787507 is about 871.0049192951.

The spelling of 660787507 in words is "six hundred sixty million, seven hundred eighty-seven thousand, five hundred seven".