665620303 has 2 divisors, whose sum is σ = 665620304. Its totient is φ = 665620302.

The previous prime is 665620297. The next prime is 665620309. The reversal of 665620303 is 303026566.

It is a balanced prime because it is at equal distance from previous prime (665620297) and next prime (665620309).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665620303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665620309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332810151 + 332810152.

It is an arithmetic number, because the mean of its divisors is an integer number (332810152).

Almost surely, 2^665620303 is an apocalyptic number.

665620303 is a deficient number, since it is larger than the sum of its proper divisors (1).

665620303 is an equidigital number, since it uses as much as digits as its factorization.

665620303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 665620303 is about 25799.6182723698. The cubic root of 665620303 is about 873.1231839827.

Adding to 665620303 its reverse (303026566), we get a palindrome (968646869).

The spelling of 665620303 in words is "six hundred sixty-five million, six hundred twenty thousand, three hundred three".