668615303 has 4 divisors (see below), whose sum is σ = 668724240. Its totient is φ = 668506368.

The previous prime is 668615273. The next prime is 668615309. The reversal of 668615303 is 303516866.

668615303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668615303 - 2¹⁰ = 668614279 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 (668615309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44675 + ... + 57732.

It is an arithmetic number, because the mean of its divisors is an integer number (167181060).

Almost surely, 2^668615303 is an apocalyptic number.

668615303 is a deficient number, since it is larger than the sum of its proper divisors (108937).

668615303 is a wasteful number, since it uses less digits than its factorization.

668615303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108936.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 668615303 is about 25857.5966207225. The cubic root of 668615303 is about 874.4307821108.

The spelling of 668615303 in words is "six hundred sixty-eight million, six hundred fifteen thousand, three hundred three".