66226427 has 2 divisors, whose sum is σ = 66226428. Its totient is φ = 66226426.

The previous prime is 66226423. The next prime is 66226463. The reversal of 66226427 is 72462266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66226427 - 2² = 66226423 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66226423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113213 + 33113214.

It is an arithmetic number, because the mean of its divisors is an integer number (33113214).

Almost surely, 2^66226427 is an apocalyptic number.

66226427 is a deficient number, since it is larger than the sum of its proper divisors (1).

66226427 is an equidigital number, since it uses as much as digits as its factorization.

66226427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 66226427 is about 8137.9620913347. The cubic root of 66226427 is about 404.5856189432.

The spelling of 66226427 in words is "sixty-six million, two hundred twenty-six thousand, four hundred twenty-seven".