660440646307 has 16 divisors (see below), whose sum is σ = 742260476160. Its totient is φ = 583058421792.

The previous prime is 660440646259. The next prime is 660440646317. The reversal of 660440646307 is 703646044066.

It is a cyclic number.

It is not a de Polignac number, because 660440646307 - 2³⁵ = 626080907939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660440646317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2323108 + ... + 2591854.

It is an arithmetic number, because the mean of its divisors is an integer number (46391279760).

Almost surely, 2^660440646307 is an apocalyptic number.

660440646307 is a deficient number, since it is larger than the sum of its proper divisors (81819829853).

660440646307 is a wasteful number, since it uses less digits than its factorization.

660440646307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277002.

The product of its (nonzero) digits is 1741824, while the sum is 46.

The spelling of 660440646307 in words is "six hundred sixty billion, four hundred forty million, six hundred forty-six thousand, three hundred seven".