12776660 has 48 divisors (see below), whose sum is σ = 29171856. Its totient is φ = 4672512.

The previous prime is 12776641. The next prime is 12776671. The reversal of 12776660 is 6667721.

12776660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 5626384 + 7150276 = 2372^2 + 2674^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12776660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40664 + ... + 40976.

It is an arithmetic number, because the mean of its divisors is an integer number (607747).

Almost surely, 2^12776660 is an apocalyptic number.

12776660 is a gapful number since it is divisible by the number (10) 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 12776660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14585928).

12776660 is an abundant number, since it is smaller than the sum of its proper divisors (16395196).

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

12776660 is a wasteful number, since it uses less digits than its factorization.

12776660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 12776660 is about 3574.4454115289. The cubic root of 12776660 is about 233.7791521879.

The spelling of 12776660 in words is "twelve million, seven hundred seventy-six thousand, six hundred sixty".