667233126649 has 2 divisors, whose sum is σ = 667233126650. Its totient is φ = 667233126648.

The previous prime is 667233126569. The next prime is 667233126683. The reversal of 667233126649 is 946621332766.

667233126649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667232486649 + 640000 = 816843^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 667233126649 - 2²⁵ = 667199572217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667233126649.

It is not a weakly prime, because it can be changed into another prime (667233126149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333616563324 + 333616563325.

It is an arithmetic number, because the mean of its divisors is an integer number (333616563325).

Almost surely, 2^667233126649 is an apocalyptic number.

It is an amenable number.

667233126649 is a deficient number, since it is larger than the sum of its proper divisors (1).

667233126649 is an equidigital number, since it uses as much as digits as its factorization.

667233126649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 55.

The spelling of 667233126649 in words is "six hundred sixty-seven billion, two hundred thirty-three million, one hundred twenty-six thousand, six hundred forty-nine".