660418320783 has 32 divisors (see below), whose sum is σ = 950009331712. Its totient is φ = 405676252800.

The previous prime is 660418320767. The next prime is 660418320817. The reversal of 660418320783 is 387023814066.

It is not a de Polignac number, because 660418320783 - 2⁴ = 660418320767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660418320743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80623218 + ... + 80631408.

It is an arithmetic number, because the mean of its divisors is an integer number (29687791616).

Almost surely, 2^660418320783 is an apocalyptic number.

660418320783 is a deficient number, since it is larger than the sum of its proper divisors (289591010929).

660418320783 is a wasteful number, since it uses less digits than its factorization.

660418320783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11695.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 660418320783 in words is "six hundred sixty billion, four hundred eighteen million, three hundred twenty thousand, seven hundred eighty-three".