665249360803 has 2 divisors, whose sum is σ = 665249360804. Its totient is φ = 665249360802.

The previous prime is 665249360753. The next prime is 665249360851. The reversal of 665249360803 is 308063942566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665249360803 - 2⁹ = 665249360291 is a prime.

It is not a weakly prime, because it can be changed into another prime (665249360863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332624680401 + 332624680402.

It is an arithmetic number, because the mean of its divisors is an integer number (332624680402).

Almost surely, 2^665249360803 is an apocalyptic number.

665249360803 is a deficient number, since it is larger than the sum of its proper divisors (1).

665249360803 is an equidigital number, since it uses as much as digits as its factorization.

665249360803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 665249360803 in words is "six hundred sixty-five billion, two hundred forty-nine million, three hundred sixty thousand, eight hundred three".