126699666259 has 2 divisors, whose sum is σ = 126699666260. Its totient is φ = 126699666258.

The previous prime is 126699666251. The next prime is 126699666263. The reversal of 126699666259 is 952666996621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126699666259 - 2³ = 126699666251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126699666194 and 126699666203.

It is not a weakly prime, because it can be changed into another prime (126699666251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63349833129 + 63349833130.

It is an arithmetic number, because the mean of its divisors is an integer number (63349833130).

Almost surely, 2^126699666259 is an apocalyptic number.

126699666259 is a deficient number, since it is larger than the sum of its proper divisors (1).

126699666259 is an equidigital number, since it uses as much as digits as its factorization.

126699666259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113374080, while the sum is 67.

The spelling of 126699666259 in words is "one hundred twenty-six billion, six hundred ninety-nine million, six hundred sixty-six thousand, two hundred fifty-nine".