1266433663 has 8 divisors (see below), whose sum is σ = 1381926096. Its totient is φ = 1151001600.

The previous prime is 1266433589. The next prime is 1266433673. The reversal of 1266433663 is 3663346621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266433663 - 2²¹ = 1264336511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266433673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36445 + ... + 62137.

It is an arithmetic number, because the mean of its divisors is an integer number (172740762).

Almost surely, 2^1266433663 is an apocalyptic number.

1266433663 is a deficient number, since it is larger than the sum of its proper divisors (115492433).

1266433663 is a wasteful number, since it uses less digits than its factorization.

1266433663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30185.

The product of its digits is 279936, while the sum is 40.

The square root of 1266433663 is about 35586.9872706303. The cubic root of 1266433663 is about 1081.9175077165.

The spelling of 1266433663 in words is "one billion, two hundred sixty-six million, four hundred thirty-three thousand, six hundred sixty-three".