664266227 has 2 divisors, whose sum is σ = 664266228. Its totient is φ = 664266226.

The previous prime is 664266203. The next prime is 664266293. The reversal of 664266227 is 722662466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664266227 - 2¹⁸ = 664004083 is a prime.

It is not a weakly prime, because it can be changed into another prime (664262227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332133113 + 332133114.

It is an arithmetic number, because the mean of its divisors is an integer number (332133114).

Almost surely, 2^664266227 is an apocalyptic number.

664266227 is a deficient number, since it is larger than the sum of its proper divisors (1).

664266227 is an equidigital number, since it uses as much as digits as its factorization.

664266227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 41.

The square root of 664266227 is about 25773.3627414042. The cubic root of 664266227 is about 872.5307151963.

The spelling of 664266227 in words is "six hundred sixty-four million, two hundred sixty-six thousand, two hundred twenty-seven".