665501066099 has 2 divisors, whose sum is σ = 665501066100. Its totient is φ = 665501066098.

The previous prime is 665501066047. The next prime is 665501066107. The reversal of 665501066099 is 990660105566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665501066099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665501066099.

It is not a weakly prime, because it can be changed into another prime (665501066999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332750533049 + 332750533050.

It is an arithmetic number, because the mean of its divisors is an integer number (332750533050).

Almost surely, 2^665501066099 is an apocalyptic number.

665501066099 is a deficient number, since it is larger than the sum of its proper divisors (1).

665501066099 is an equidigital number, since it uses as much as digits as its factorization.

665501066099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 665501066099 in words is "six hundred sixty-five billion, five hundred one million, sixty-six thousand, ninety-nine".