66441343 has 2 divisors, whose sum is σ = 66441344. Its totient is φ = 66441342.

The previous prime is 66441337. The next prime is 66441367. The reversal of 66441343 is 34314466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66441343 - 2²⁵ = 32886911 is a prime.

It is equal to p_3920773 and since 66441343 and 3920773 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66441143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33220671 + 33220672.

It is an arithmetic number, because the mean of its divisors is an integer number (33220672).

Almost surely, 2^66441343 is an apocalyptic number.

66441343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66441343 is an equidigital number, since it uses as much as digits as its factorization.

66441343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 31.

The square root of 66441343 is about 8151.1559302960. The cubic root of 66441343 is about 405.0227960547.

The spelling of 66441343 in words is "sixty-six million, four hundred forty-one thousand, three hundred forty-three".