667077728227 has 2 divisors, whose sum is σ = 667077728228. Its totient is φ = 667077728226.

The previous prime is 667077728221. The next prime is 667077728309. The reversal of 667077728227 is 722827770766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667077728227 - 2⁷ = 667077728099 is a prime.

It is not a weakly prime, because it can be changed into another prime (667077728221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333538864113 + 333538864114.

It is an arithmetic number, because the mean of its divisors is an integer number (333538864114).

Almost surely, 2^667077728227 is an apocalyptic number.

667077728227 is a deficient number, since it is larger than the sum of its proper divisors (1).

667077728227 is an equidigital number, since it uses as much as digits as its factorization.

667077728227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38723328, while the sum is 61.

The spelling of 667077728227 in words is "six hundred sixty-seven billion, seventy-seven million, seven hundred twenty-eight thousand, two hundred twenty-seven".