1266255650 has 24 divisors (see below), whose sum is σ = 2569348944. Its totient is φ = 460456400.

The previous prime is 1266255637. The next prime is 1266255673. The reversal of 1266255650 is 565526621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1150592 + ... + 1151691.

It is an arithmetic number, because the mean of its divisors is an integer number (107056206).

Almost surely, 2^1266255650 is an apocalyptic number.

1266255650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266255650 is an abundant number, since it is smaller than the sum of its proper divisors (1303093294).

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

1266255650 is a wasteful number, since it uses less digits than its factorization.

1266255650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302306 (or 2302301 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1266255650 is about 35584.4860859336. The cubic root of 1266255650 is about 1081.8668130212.

The spelling of 1266255650 in words is "one billion, two hundred sixty-six million, two hundred fifty-five thousand, six hundred fifty".