1264266666 has 24 divisors (see below), whose sum is σ = 2949956100. Its totient is φ = 389005056.

The previous prime is 1264266649. The next prime is 1264266667. The reversal of 1264266666 is 6666624621.

It can be written as a sum of positive squares in 2 ways, for example, as 1241082441 + 23184225 = 35229^2 + 4815^2 .

1264266666 is a modest number, since divided by 66666 gives 12642 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1264266667) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 2701191 + ... + 2701658.

Almost surely, 2^1264266666 is an apocalyptic number.

1264266666 is an abundant number, since it is smaller than the sum of its proper divisors (1685689434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264266666 is a wasteful number, since it uses less digits than its factorization.

1264266666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402870 (or 5402867 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 1264266666 is about 35556.5277551113. The cubic root of 1264266666 is about 1081.3000650590.

The spelling of 1264266666 in words is "one billion, two hundred sixty-four million, two hundred sixty-six thousand, six hundred sixty-six".