816202663 has 2 divisors, whose sum is σ = 816202664. Its totient is φ = 816202662.

The previous prime is 816202603. The next prime is 816202687. The reversal of 816202663 is 366202618.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816202663 is a prime.

It is equal to p_41936506 and since 816202663 and 41936506 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816202603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408101331 + 408101332.

It is an arithmetic number, because the mean of its divisors is an integer number (408101332).

Almost surely, 2^816202663 is an apocalyptic number.

816202663 is a deficient number, since it is larger than the sum of its proper divisors (1).

816202663 is an equidigital number, since it uses as much as digits as its factorization.

816202663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 816202663 is about 28569.2608059782. The cubic root of 816202663 is about 934.5431010449.

The spelling of 816202663 in words is "eight hundred sixteen million, two hundred two thousand, six hundred sixty-three".