66225847 has 2 divisors, whose sum is σ = 66225848. Its totient is φ = 66225846.

The previous prime is 66225839. The next prime is 66225851. The reversal of 66225847 is 74852266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66225847 - 2³ = 66225839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66225857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33112923 + 33112924.

It is an arithmetic number, because the mean of its divisors is an integer number (33112924).

Almost surely, 2^66225847 is an apocalyptic number.

66225847 is a deficient number, since it is larger than the sum of its proper divisors (1).

66225847 is an equidigital number, since it uses as much as digits as its factorization.

66225847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 66225847 is about 8137.9264557994. The cubic root of 66225847 is about 404.5844378420.

The spelling of 66225847 in words is "sixty-six million, two hundred twenty-five thousand, eight hundred forty-seven".