1266645632236 has 12 divisors (see below), whose sum is σ = 2216927163528. Its totient is φ = 633237871232.

The previous prime is 1266645632233. The next prime is 1266645632237. The reversal of 1266645632236 is 6322365466621.

It is not an unprimeable number, because it can be changed into a prime (1266645632233) 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, 21202666 + ... + 21262321.

It is an arithmetic number, because the mean of its divisors is an integer number (184743930294).

Almost surely, 2^{1266645632236} is an apocalyptic number.

It is an amenable number.

1266645632236 is a deficient number, since it is larger than the sum of its proper divisors (950281531292).

1266645632236 is a wasteful number, since it uses less digits than its factorization.

1266645632236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42472448 (or 42472446 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 52.

The spelling of 1266645632236 in words is "one trillion, two hundred sixty-six billion, six hundred forty-five million, six hundred thirty-two thousand, two hundred thirty-six".