1266332663917 has 8 divisors (see below), whose sum is σ = 1341967865472. Its totient is φ = 1190824689600.

The previous prime is 1266332663903. The next prime is 1266332663923. The reversal of 1266332663917 is 7193662336621.

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 1266332663917 - 2²⁷ = 1266198446189 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 (1266332663927) 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, 31786309 + ... + 31826122.

It is an arithmetic number, because the mean of its divisors is an integer number (167745983184).

Almost surely, 2^{1266332663917} is an apocalyptic number.

1266332663917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1266332663917 is a deficient number, since it is larger than the sum of its proper divisors (75635201555).

1266332663917 is a wasteful number, since it uses less digits than its factorization.

1266332663917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63613619.

The product of its digits is 8817984, while the sum is 55.

The spelling of 1266332663917 in words is "one trillion, two hundred sixty-six billion, three hundred thirty-two million, six hundred sixty-three thousand, nine hundred seventeen".