126090931066 has 4 divisors (see below), whose sum is σ = 189136396602. Its totient is φ = 63045465532.

The previous prime is 126090931033. The next prime is 126090931069. The reversal of 126090931066 is 660139090621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660139090621 = 17 ⋅38831711213.

It can be written as a sum of positive squares in only one way, i.e., 125865300625 + 225630441 = 354775^2 + 15021^2 .

It is not an unprimeable number, because it can be changed into a prime (126090931069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31522732765 + ... + 31522732768.

Almost surely, 2^126090931066 is an apocalyptic number.

126090931066 is a deficient number, since it is larger than the sum of its proper divisors (63045465536).

126090931066 is an equidigital number, since it uses as much as digits as its factorization.

126090931066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63045465535.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 126090931066 in words is "one hundred twenty-six billion, ninety million, nine hundred thirty-one thousand, sixty-six".