664737009227 has 2 divisors, whose sum is σ = 664737009228. Its totient is φ = 664737009226.

The previous prime is 664737009197. The next prime is 664737009241. The reversal of 664737009227 is 722900737466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664737009227 - 2¹⁸ = 664736747083 is a prime.

It is not a weakly prime, because it can be changed into another prime (664737009427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332368504613 + 332368504614.

It is an arithmetic number, because the mean of its divisors is an integer number (332368504614).

Almost surely, 2^664737009227 is an apocalyptic number.

664737009227 is a deficient number, since it is larger than the sum of its proper divisors (1).

664737009227 is an equidigital number, since it uses as much as digits as its factorization.

664737009227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 664737009227 in words is "six hundred sixty-four billion, seven hundred thirty-seven million, nine thousand, two hundred twenty-seven".