71668433 has 2 divisors, whose sum is σ = 71668434. Its totient is φ = 71668432.

The previous prime is 71668423. The next prime is 71668453. The reversal of 71668433 is 33486617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50027329 + 21641104 = 7073^2 + 4652^2 .

It is a cyclic number.

It is not a de Polignac number, because 71668433 - 2⁴ = 71668417 is a prime.

It is not a weakly prime, because it can be changed into another prime (71668423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35834216 + 35834217.

It is an arithmetic number, because the mean of its divisors is an integer number (35834217).

Almost surely, 2^71668433 is an apocalyptic number.

It is an amenable number.

71668433 is a deficient number, since it is larger than the sum of its proper divisors (1).

71668433 is an equidigital number, since it uses as much as digits as its factorization.

71668433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 71668433 is about 8465.7210561180. The cubic root of 71668433 is about 415.3771826086.

The spelling of 71668433 in words is "seventy-one million, six hundred sixty-eight thousand, four hundred thirty-three".