126663775 has 18 divisors (see below), whose sum is σ = 182707800. Its totient is φ = 86854320.

The previous prime is 126663773. The next prime is 126663791. The reversal of 126663775 is 577366621.

It is not a de Polignac number, because 126663775 - 2¹ = 126663773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126663773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 50475 + ... + 52924.

Almost surely, 2^126663775 is an apocalyptic number.

126663775 is a deficient number, since it is larger than the sum of its proper divisors (56044025).

126663775 is a wasteful number, since it uses less digits than its factorization.

126663775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103423 (or 103411 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The square root of 126663775 is about 11254.5002110267. The cubic root of 126663775 is about 502.2085965052.

It can be divided in two parts, 12666377 and 5, that multiplied together give a triangular number (63331885 = T₁₁₂₅₄).

The spelling of 126663775 in words is "one hundred twenty-six million, six hundred sixty-three thousand, seven hundred seventy-five".