66227737 has 2 divisors, whose sum is σ = 66227738. Its totient is φ = 66227736.

The previous prime is 66227731. The next prime is 66227753. The reversal of 66227737 is 73772266.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 3326976 = 7931^2 + 1824^2 .

It is a cyclic number.

It is not a de Polignac number, because 66227737 - 2³ = 66227729 is a prime.

It is a super-2 number, since 2×66227737² = 8772226296282338, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3908839 and since 66227737 and 3908839 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66227737.

It is not a weakly prime, because it can be changed into another prime (66227731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113868 + 33113869.

It is an arithmetic number, because the mean of its divisors is an integer number (33113869).

Almost surely, 2^66227737 is an apocalyptic number.

It is an amenable number.

66227737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66227737 is an equidigital number, since it uses as much as digits as its factorization.

66227737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 40.

The square root of 66227737 is about 8138.0425779176. The cubic root of 66227737 is about 404.5882865775.

The spelling of 66227737 in words is "sixty-six million, two hundred twenty-seven thousand, seven hundred thirty-seven".