660705720207 has 24 divisors (see below), whose sum is σ = 954601200000. Its totient is φ = 406297071648.

The previous prime is 660705720179. The next prime is 660705720223. The reversal of 660705720207 is 702027507066.

It is not a de Polignac number, because 660705720207 - 2⁷ = 660705720079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660705720247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243544 + ... + 1175042.

It is an arithmetic number, because the mean of its divisors is an integer number (39775050000).

Almost surely, 2^660705720207 is an apocalyptic number.

660705720207 is a deficient number, since it is larger than the sum of its proper divisors (293895479793).

660705720207 is a wasteful number, since it uses less digits than its factorization.

660705720207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932927 (or 932914 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 660705720207 in words is "six hundred sixty billion, seven hundred five million, seven hundred twenty thousand, two hundred seven".