126586742666 has 4 divisors (see below), whose sum is σ = 189880114002. Its totient is φ = 63293371332.

The previous prime is 126586742657. The next prime is 126586742707. The reversal of 126586742666 is 666247685621.

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

It can be written as a sum of positive squares in only one way, i.e., 120356955625 + 6229787041 = 346925^2 + 78929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31646685665 + ... + 31646685668.

Almost surely, 2^126586742666 is an apocalyptic number.

126586742666 is a deficient number, since it is larger than the sum of its proper divisors (63293371336).

126586742666 is an equidigital number, since it uses as much as digits as its factorization.

126586742666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63293371335.

The product of its digits is 34836480, while the sum is 59.

The spelling of 126586742666 in words is "one hundred twenty-six billion, five hundred eighty-six million, seven hundred forty-two thousand, six hundred sixty-six".