126664663201 has 2 divisors, whose sum is σ = 126664663202. Its totient is φ = 126664663200.

The previous prime is 126664663121. The next prime is 126664663253. The reversal of 126664663201 is 102366466621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113467248801 + 13197414400 = 336849^2 + 114880^2 .

It is an emirp because it is prime and its reverse (102366466621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126664663201 - 2⁹ = 126664662689 is a prime.

It is not a weakly prime, because it can be changed into another prime (126664663501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63332331600 + 63332331601.

It is an arithmetic number, because the mean of its divisors is an integer number (63332331601).

Almost surely, 2^126664663201 is an apocalyptic number.

It is an amenable number.

126664663201 is a deficient number, since it is larger than the sum of its proper divisors (1).

126664663201 is an equidigital number, since it uses as much as digits as its factorization.

126664663201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 126664663201 in words is "one hundred twenty-six billion, six hundred sixty-four million, six hundred sixty-three thousand, two hundred one".