12616666 has 4 divisors (see below), whose sum is σ = 18925002. Its totient is φ = 6308332.

The previous prime is 12616649. The next prime is 12616687. The reversal of 12616666 is 66661621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11417641 + 1199025 = 3379^2 + 1095^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3154165 + ... + 3154168.

Almost surely, 2^12616666 is an apocalyptic number.

12616666 is a deficient number, since it is larger than the sum of its proper divisors (6308336).

12616666 is an equidigital number, since it uses as much as digits as its factorization.

12616666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308335.

The product of its digits is 15552, while the sum is 34.

The square root of 12616666 is about 3551.9946508969. The cubic root of 12616666 is about 232.7992277856.

The spelling of 12616666 in words is "twelve million, six hundred sixteen thousand, six hundred sixty-six".