66494347 has 2 divisors, whose sum is σ = 66494348. Its totient is φ = 66494346.

The previous prime is 66494321. The next prime is 66494353. The reversal of 66494347 is 74349466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66494347 - 2²³ = 58105739 is a prime.

It is not a weakly prime, because it can be changed into another prime (66494387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33247173 + 33247174.

It is an arithmetic number, because the mean of its divisors is an integer number (33247174).

Almost surely, 2^66494347 is an apocalyptic number.

66494347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66494347 is an equidigital number, since it uses as much as digits as its factorization.

66494347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 43.

The square root of 66494347 is about 8154.4066001151. The cubic root of 66494347 is about 405.1304705895.

The spelling of 66494347 in words is "sixty-six million, four hundred ninety-four thousand, three hundred forty-seven".