12667776 has 64 divisors (see below), whose sum is σ = 36720000. Its totient is φ = 3837440.

The previous prime is 12667667. The next prime is 12667777. The reversal of 12667776 is 67776621.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12667777) 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, 2725 + ... + 5723.

It is an arithmetic number, because the mean of its divisors is an integer number (573750).

Almost surely, 2^12667776 is an apocalyptic number.

12667776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12667776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18360000).

12667776 is an abundant number, since it is smaller than the sum of its proper divisors (24052224).

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

12667776 is a wasteful number, since it uses less digits than its factorization.

12667776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3015 counting only the distinct ones).

The product of its digits is 148176, while the sum is 42.

The square root of 12667776 is about 3559.1819284774. The cubic root of 12667776 is about 233.1131601105.

The spelling of 12667776 in words is "twelve million, six hundred sixty-seven thousand, seven hundred seventy-six".