12266778 has 8 divisors (see below), whose sum is σ = 24533568. Its totient is φ = 4088924.

The previous prime is 12266777. The next prime is 12266789. The reversal of 12266778 is 87766221.

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

12266778 is an admirable number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12266777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022226 + ... + 1022237.

It is an arithmetic number, because the mean of its divisors is an integer number (3066696).

Almost surely, 2^12266778 is an apocalyptic number.

12266778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12266778 is a wasteful number, since it uses less digits than its factorization.

12266778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044468.

The product of its digits is 56448, while the sum is 39.

The square root of 12266778 is about 3502.3960370010. The cubic root of 12266778 is about 230.6270099927.

The spelling of 12266778 in words is "twelve million, two hundred sixty-six thousand, seven hundred seventy-eight".