668055205305 has 48 divisors (see below), whose sum is σ = 1170154038144. Its totient is φ = 352546421760.

The previous prime is 668055205291. The next prime is 668055205351. The reversal of 668055205305 is 503502550866.

668055205305 is a `hidden beast` number, since 6 + 68 + 0 + 5 + 52 + 0 + 530 + 5 = 666.

It is not a de Polignac number, because 668055205305 - 2⁷ = 668055205177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24111510 + ... + 24139200.

It is an arithmetic number, because the mean of its divisors is an integer number (24378209128).

Almost surely, 2^668055205305 is an apocalyptic number.

It is an amenable number.

668055205305 is a deficient number, since it is larger than the sum of its proper divisors (502098832839).

668055205305 is a wasteful number, since it uses less digits than its factorization.

668055205305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33326 (or 33323 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 668055205305 in words is "six hundred sixty-eight billion, fifty-five million, two hundred five thousand, three hundred five".