66227472277 has 2 divisors, whose sum is σ = 66227472278. Its totient is φ = 66227472276.

The previous prime is 66227472217. The next prime is 66227472349. The reversal of 66227472277 is 77227472266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50638950961 + 15588521316 = 225031^2 + 124854^2 .

It is a cyclic number.

It is not a de Polignac number, because 66227472277 - 2¹¹ = 66227470229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66227472217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113736138 + 33113736139.

It is an arithmetic number, because the mean of its divisors is an integer number (33113736139).

Almost surely, 2^66227472277 is an apocalyptic number.

It is an amenable number.

66227472277 is a deficient number, since it is larger than the sum of its proper divisors (1).

66227472277 is an equidigital number, since it uses as much as digits as its factorization.

66227472277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5531904, while the sum is 52.

The spelling of 66227472277 in words is "sixty-six billion, two hundred twenty-seven million, four hundred seventy-two thousand, two hundred seventy-seven".