12783270666 has 32 divisors (see below), whose sum is σ = 27087445440. Its totient is φ = 4007920896.

The previous prime is 12783270629. The next prime is 12783270679. The reversal of 12783270666 is 66607238721.

It is a super-4 number, since 4×12783270666⁴ (a number of 42 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127440 + ... + 204468.

It is an arithmetic number, because the mean of its divisors is an integer number (846482670).

Almost surely, 2^12783270666 is an apocalyptic number.

12783270666 is an abundant number, since it is smaller than the sum of its proper divisors (14304174774).

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

12783270666 is a wasteful number, since it uses less digits than its factorization.

12783270666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78678.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 12783270666 in words is "twelve billion, seven hundred eighty-three million, two hundred seventy thousand, six hundred sixty-six".