1264266664 has 16 divisors (see below), whose sum is σ = 2415227220. Its totient is φ = 620206080.

The previous prime is 1264266649. The next prime is 1264266667. The reversal of 1264266664 is 4666624621.

It can be written as a sum of positive squares in 2 ways, for example, as 1187353764 + 76912900 = 34458^2 + 8770^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1264266664.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490457 + ... + 1491304.

Almost surely, 2^1264266664 is an apocalyptic number.

It is an amenable number.

1264266664 is a deficient number, since it is larger than the sum of its proper divisors (1150960556).

1264266664 is a wasteful number, since it uses less digits than its factorization.

1264266664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981820 (or 2981816 counting only the distinct ones).

The product of its digits is 497664, while the sum is 43.

The square root of 1264266664 is about 35556.5277269871. The cubic root of 1264266664 is about 1081.3000644889.

The spelling of 1264266664 in words is "one billion, two hundred sixty-four million, two hundred sixty-six thousand, six hundred sixty-four".