1266318722 has 4 divisors (see below), whose sum is σ = 1899478086. Its totient is φ = 633159360.

The previous prime is 1266318719. The next prime is 1266318737. The reversal of 1266318722 is 2278136621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2278136621 = 1093 ⋅2084297.

It can be written as a sum of positive squares in only one way, i.e., 725709721 + 540609001 = 26939^2 + 23251^2 .

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, 316579679 + ... + 316579682.

Almost surely, 2^1266318722 is an apocalyptic number.

1266318722 is a deficient number, since it is larger than the sum of its proper divisors (633159364).

1266318722 is an equidigital number, since it uses as much as digits as its factorization.

1266318722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633159363.

The product of its digits is 48384, while the sum is 38.

The square root of 1266318722 is about 35585.3723037992. The cubic root of 1266318722 is about 1081.8847752631.

The spelling of 1266318722 in words is "one billion, two hundred sixty-six million, three hundred eighteen thousand, seven hundred twenty-two".