12945666 has 16 divisors (see below), whose sum is σ = 26493984. Its totient is φ = 4214784.

The previous prime is 12945659. The next prime is 12945677. The reversal of 12945666 is 66654921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24831 + ... + 25346.

It is an arithmetic number, because the mean of its divisors is an integer number (1655874).

Almost surely, 2^12945666 is an apocalyptic number.

12945666 is an abundant number, since it is smaller than the sum of its proper divisors (13548318).

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

12945666 is a wasteful number, since it uses less digits than its factorization.

12945666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50225.

The product of its digits is 77760, while the sum is 39.

The square root of 12945666 is about 3598.0086158874. The cubic root of 12945666 is about 234.8054282019.

The spelling of 12945666 in words is "twelve million, nine hundred forty-five thousand, six hundred sixty-six".