668015303 has 2 divisors, whose sum is σ = 668015304. Its totient is φ = 668015302.

The previous prime is 668015273. The next prime is 668015317. The reversal of 668015303 is 303510866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668015303 - 2²⁸ = 399579847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668015303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668015333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334007651 + 334007652.

It is an arithmetic number, because the mean of its divisors is an integer number (334007652).

Almost surely, 2^668015303 is an apocalyptic number.

668015303 is a deficient number, since it is larger than the sum of its proper divisors (1).

668015303 is an equidigital number, since it uses as much as digits as its factorization.

668015303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 668015303 is about 25845.9920103679. The cubic root of 668015303 is about 874.1691391381.

The spelling of 668015303 in words is "six hundred sixty-eight million, fifteen thousand, three hundred three".