1266567256 has 8 divisors (see below), whose sum is σ = 2374813620. Its totient is φ = 633283624.

The previous prime is 1266567251. The next prime is 1266567259. The reversal of 1266567256 is 6527656621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1266567256² = 3208385227942739072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266567251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79160446 + ... + 79160461.

Almost surely, 2^1266567256 is an apocalyptic number.

It is an amenable number.

1266567256 is a deficient number, since it is larger than the sum of its proper divisors (1108246364).

1266567256 is a wasteful number, since it uses less digits than its factorization.

1266567256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158320913 (or 158320909 counting only the distinct ones).

The product of its digits is 907200, while the sum is 46.

The square root of 1266567256 is about 35588.8642134025. The cubic root of 1266567256 is about 1081.9555493257.

The spelling of 1266567256 in words is "one billion, two hundred sixty-six million, five hundred sixty-seven thousand, two hundred fifty-six".