66797443 has 2 divisors, whose sum is σ = 66797444. Its totient is φ = 66797442.

The previous prime is 66797441. The next prime is 66797453. The reversal of 66797443 is 34479766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66797443 - 2¹ = 66797441 is a prime.

Together with 66797441, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66797393 and 66797402.

It is not a weakly prime, because it can be changed into another prime (66797441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33398721 + 33398722.

It is an arithmetic number, because the mean of its divisors is an integer number (33398722).

Almost surely, 2^66797443 is an apocalyptic number.

66797443 is a deficient number, since it is larger than the sum of its proper divisors (1).

66797443 is an equidigital number, since it uses as much as digits as its factorization.

66797443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 46.

The square root of 66797443 is about 8172.9702679014. The cubic root of 66797443 is about 405.7450958845.

The spelling of 66797443 in words is "sixty-six million, seven hundred ninety-seven thousand, four hundred forty-three".