1266663572 has 12 divisors (see below), whose sum is σ = 2247882336. Its totient is φ = 624411480.

The previous prime is 1266663571. The next prime is 1266663577. The reversal of 1266663572 is 2753666621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266663571) 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, 2229758 + ... + 2230325.

It is an arithmetic number, because the mean of its divisors is an integer number (187323528).

Almost surely, 2^1266663572 is an apocalyptic number.

It is an amenable number.

1266663572 is a deficient number, since it is larger than the sum of its proper divisors (981218764).

1266663572 is a wasteful number, since it uses less digits than its factorization.

1266663572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460158 (or 4460156 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 1266663572 is about 35590.2173637644. The cubic root of 1266663572 is about 1081.9829743700.

The spelling of 1266663572 in words is "one billion, two hundred sixty-six million, six hundred sixty-three thousand, five hundred seventy-two".