12661976 has 16 divisors (see below), whose sum is σ = 23806440. Its totient is φ = 6313600.

The previous prime is 12661973. The next prime is 12661997. The reversal of 12661976 is 67916621.

It is a super-4 number, since 4×12661976⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661973) 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, 1235 + ... + 5181.

Almost surely, 2^12661976 is an apocalyptic number.

It is an amenable number.

12661976 is a deficient number, since it is larger than the sum of its proper divisors (11144464).

12661976 is a wasteful number, since it uses less digits than its factorization.

12661976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354 (or 4350 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 12661976 is about 3558.3670412143. The cubic root of 12661976 is about 233.0775773654.

The spelling of 12661976 in words is "twelve million, six hundred sixty-one thousand, nine hundred seventy-six".