126736663 has 4 divisors (see below), whose sum is σ = 126761680. Its totient is φ = 126711648.

The previous prime is 126736657. The next prime is 126736667. The reversal of 126736663 is 366637621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126736663 - 2²⁵ = 93182231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126736667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1923 + ... + 16036.

It is an arithmetic number, because the mean of its divisors is an integer number (31690420).

Almost surely, 2^126736663 is an apocalyptic number.

126736663 is a deficient number, since it is larger than the sum of its proper divisors (25017).

126736663 is an equidigital number, since it uses as much as digits as its factorization.

126736663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25016.

The product of its digits is 163296, while the sum is 40.

The square root of 126736663 is about 11257.7379166509. The cubic root of 126736663 is about 502.3049091277.

The spelling of 126736663 in words is "one hundred twenty-six million, seven hundred thirty-six thousand, six hundred sixty-three".