1266732706 has 4 divisors (see below), whose sum is σ = 1900099062. Its totient is φ = 633366352.

The previous prime is 1266732667. The next prime is 1266732737. The reversal of 1266732706 is 6072376621.

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., 751034025 + 515698681 = 27405^2 + 22709^2 .

It is a super-2 number, since 2×1266732706² = 3209223496900164872, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316683175 + ... + 316683178.

Almost surely, 2^1266732706 is an apocalyptic number.

1266732706 is a deficient number, since it is larger than the sum of its proper divisors (633366356).

1266732706 is an equidigital number, since it uses as much as digits as its factorization.

1266732706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633366355.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 1266732706 is about 35591.1886005511. The cubic root of 1266732706 is about 1082.0026587471.

The spelling of 1266732706 in words is "one billion, two hundred sixty-six million, seven hundred thirty-two thousand, seven hundred six".