66425713 has 2 divisors, whose sum is σ = 66425714. Its totient is φ = 66425712.

The previous prime is 66425687. The next prime is 66425719. The reversal of 66425713 is 31752466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 1912689 = 8032^2 + 1383^2 .

It is a cyclic number.

It is not a de Polignac number, because 66425713 - 2⁹ = 66425201 is a prime.

It is not a weakly prime, because it can be changed into another prime (66425719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212856 + 33212857.

It is an arithmetic number, because the mean of its divisors is an integer number (33212857).

Almost surely, 2^66425713 is an apocalyptic number.

It is an amenable number.

66425713 is a deficient number, since it is larger than the sum of its proper divisors (1).

66425713 is an equidigital number, since it uses as much as digits as its factorization.

66425713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 66425713 is about 8150.1971141807. The cubic root of 66425713 is about 404.9910336886.

The spelling of 66425713 in words is "sixty-six million, four hundred twenty-five thousand, seven hundred thirteen".