126668074109 has 2 divisors, whose sum is σ = 126668074110. Its totient is φ = 126668074108.

The previous prime is 126668074103. The next prime is 126668074187. The reversal of 126668074109 is 901470866621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99152563225 + 27515510884 = 314885^2 + 165878^2 .

It is a cyclic number.

It is not a de Polignac number, because 126668074109 - 2²⁸ = 126399638653 is a prime.

It is a super-2 number, since 2×126668074109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126668074103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63334037054 + 63334037055.

It is an arithmetic number, because the mean of its divisors is an integer number (63334037055).

Almost surely, 2^126668074109 is an apocalyptic number.

It is an amenable number.

126668074109 is a deficient number, since it is larger than the sum of its proper divisors (1).

126668074109 is an equidigital number, since it uses as much as digits as its factorization.

126668074109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 126668074109 in words is "one hundred twenty-six billion, six hundred sixty-eight million, seventy-four thousand, one hundred nine".