12695666 has 8 divisors (see below), whose sum is σ = 19218540. Its totient is φ = 6289488.

The previous prime is 12695633. The next prime is 12695671. The reversal of 12695666 is 66659621.

It can be written as a sum of positive squares in 2 ways, for example, as 11937025 + 758641 = 3455^2 + 871^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12695666² = 322359870367112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28901 + ... + 29336.

Almost surely, 2^12695666 is an apocalyptic number.

12695666 is a deficient number, since it is larger than the sum of its proper divisors (6522874).

12695666 is a wasteful number, since it uses less digits than its factorization.

12695666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58348.

The product of its digits is 116640, while the sum is 41.

The square root of 12695666 is about 3563.0978094911. The cubic root of 12695666 is about 233.2841125203.

The spelling of 12695666 in words is "twelve million, six hundred ninety-five thousand, six hundred sixty-six".