66531343 has 2 divisors, whose sum is σ = 66531344. Its totient is φ = 66531342.

The previous prime is 66531329. The next prime is 66531359. The reversal of 66531343 is 34313566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66531343 - 2⁹ = 66530831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66531383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33265671 + 33265672.

It is an arithmetic number, because the mean of its divisors is an integer number (33265672).

Almost surely, 2^66531343 is an apocalyptic number.

66531343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66531343 is an equidigital number, since it uses as much as digits as its factorization.

66531343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 31.

The square root of 66531343 is about 8156.6747513923. The cubic root of 66531343 is about 405.2055919030.

The spelling of 66531343 in words is "sixty-six million, five hundred thirty-one thousand, three hundred forty-three".