12777916 has 12 divisors (see below), whose sum is σ = 22504888. Its totient is φ = 6347952.

The previous prime is 12777911. The next prime is 12777917. The reversal of 12777916 is 61977721.

It is a super-3 number, since 3×12777916³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9546 + ... + 10801.

Almost surely, 2^12777916 is an apocalyptic number.

It is an amenable number.

12777916 is a deficient number, since it is larger than the sum of its proper divisors (9726972).

12777916 is a wasteful number, since it uses less digits than its factorization.

12777916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20508 (or 20506 counting only the distinct ones).

The product of its digits is 37044, while the sum is 40.

The square root of 12777916 is about 3574.6210988019. The cubic root of 12777916 is about 233.7868124317.

The spelling of 12777916 in words is "twelve million, seven hundred seventy-seven thousand, nine hundred sixteen".