66931343 has 2 divisors, whose sum is σ = 66931344. Its totient is φ = 66931342.

The previous prime is 66931331. The next prime is 66931351. The reversal of 66931343 is 34313966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66931343 - 2⁴ = 66931327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66931313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33465671 + 33465672.

It is an arithmetic number, because the mean of its divisors is an integer number (33465672).

Almost surely, 2^66931343 is an apocalyptic number.

66931343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66931343 is an equidigital number, since it uses as much as digits as its factorization.

66931343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 66931343 is about 8181.1578031474. The cubic root of 66931343 is about 406.0160294415.

The spelling of 66931343 in words is "sixty-six million, nine hundred thirty-one thousand, three hundred forty-three".