66797347 has 2 divisors, whose sum is σ = 66797348. Its totient is φ = 66797346.

The previous prime is 66797333. The next prime is 66797363. The reversal of 66797347 is 74379766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66797347 - 2¹¹ = 66795299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66797347.

It is not a weakly prime, because it can be changed into another prime (66797317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33398673 + 33398674.

It is an arithmetic number, because the mean of its divisors is an integer number (33398674).

Almost surely, 2^66797347 is an apocalyptic number.

66797347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66797347 is an equidigital number, since it uses as much as digits as its factorization.

66797347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 49.

The square root of 66797347 is about 8172.9643948815. The cubic root of 66797347 is about 405.7449015081.

The spelling of 66797347 in words is "sixty-six million, seven hundred ninety-seven thousand, three hundred forty-seven".