12366477750781 has 48 divisors (see below), whose sum is σ = 16451700072192. Its totient is φ = 9067647536640.

The previous prime is 12366477750769. The next prime is 12366477750793. The reversal of 12366477750781 is 18705777466321.

It is an interprime number because it is at equal distance from previous prime (12366477750769) and next prime (12366477750793).

It is not a de Polignac number, because 12366477750781 - 2¹⁵ = 12366477718013 is a prime.

It is a super-2 number, since 2×12366477750781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12366477750581) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77862456 + ... + 78021118.

It is an arithmetic number, because the mean of its divisors is an integer number (342743751504).

Almost surely, 2^{12366477750781} is an apocalyptic number.

12366477750781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12366477750781 is a deficient number, since it is larger than the sum of its proper divisors (4085222321411).

12366477750781 is a wasteful number, since it uses less digits than its factorization.

12366477750781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164122 (or 164111 counting only the distinct ones).

The product of its (nonzero) digits is 82978560, while the sum is 64.

The spelling of 12366477750781 in words is "twelve trillion, three hundred sixty-six billion, four hundred seventy-seven million, seven hundred fifty thousand, seven hundred eighty-one".