126236666 has 4 divisors (see below), whose sum is σ = 189355002. Its totient is φ = 63118332.

The previous prime is 126236659. The next prime is 126236687. The reversal of 126236666 is 666632621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666632621 = 23 ⋅28984027.

It can be written as a sum of positive squares in only one way, i.e., 121462441 + 4774225 = 11021^2 + 2185^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31559165 + ... + 31559168.

Almost surely, 2^126236666 is an apocalyptic number.

126236666 is a deficient number, since it is larger than the sum of its proper divisors (63118336).

126236666 is an equidigital number, since it uses as much as digits as its factorization.

126236666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63118335.

The product of its digits is 93312, while the sum is 38.

The square root of 126236666 is about 11235.5091562421. The cubic root of 126236666 is about 501.6434800280.

The spelling of 126236666 in words is "one hundred twenty-six million, two hundred thirty-six thousand, six hundred sixty-six".