71668733 has 2 divisors, whose sum is σ = 71668734. Its totient is φ = 71668732.

The previous prime is 71668711. The next prime is 71668747. The reversal of 71668733 is 33786617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49182169 + 22486564 = 7013^2 + 4742^2 .

It is a cyclic number.

It is not a de Polignac number, because 71668733 - 2¹⁶ = 71603197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71668433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35834366 + 35834367.

It is an arithmetic number, because the mean of its divisors is an integer number (35834367).

Almost surely, 2^71668733 is an apocalyptic number.

It is an amenable number.

71668733 is a deficient number, since it is larger than the sum of its proper divisors (1).

71668733 is an equidigital number, since it uses as much as digits as its factorization.

71668733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 71668733 is about 8465.7387746138. The cubic root of 71668733 is about 415.3777621895.

The spelling of 71668733 in words is "seventy-one million, six hundred sixty-eight thousand, seven hundred thirty-three".