816882666547 has 2 divisors, whose sum is σ = 816882666548. Its totient is φ = 816882666546.

The previous prime is 816882666541. The next prime is 816882666569. The reversal of 816882666547 is 745666288618.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816882666547 is a prime.

It is not a weakly prime, because it can be changed into another prime (816882666541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408441333273 + 408441333274.

It is an arithmetic number, because the mean of its divisors is an integer number (408441333274).

Almost surely, 2^816882666547 is an apocalyptic number.

816882666547 is a deficient number, since it is larger than the sum of its proper divisors (1).

816882666547 is an equidigital number, since it uses as much as digits as its factorization.

816882666547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185794560, while the sum is 67.

The spelling of 816882666547 in words is "eight hundred sixteen billion, eight hundred eighty-two million, six hundred sixty-six thousand, five hundred forty-seven".