665880858606303 has 24 divisors (see below), whose sum is σ = 1018420137189936. Its totient is φ = 417801805497600.

The previous prime is 665880858606239. The next prime is 665880858606307. The reversal of 665880858606303 is 303606858088566.

665880858606303 is a `hidden beast` number, since 6 + 6 + 5 + 8 + 8 + 0 + 8 + 5 + 8 + 606 + 3 + 0 + 3 = 666.

It is not a de Polignac number, because 665880858606303 - 2⁶ = 665880858606239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665880858606307) 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, 19081053 + ... + 41180678.

It is an arithmetic number, because the mean of its divisors is an integer number (42434172382914).

Almost surely, 2^{665880858606303} is an apocalyptic number.

665880858606303 is a deficient number, since it is larger than the sum of its proper divisors (352539278583633).

665880858606303 is a wasteful number, since it uses less digits than its factorization.

665880858606303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60333975 (or 60333972 counting only the distinct ones).

The product of its (nonzero) digits is 1194393600, while the sum is 72.

The spelling of 665880858606303 in words is "six hundred sixty-five trillion, eight hundred eighty billion, eight hundred fifty-eight million, six hundred six thousand, three hundred three".