12620959666 has 16 divisors (see below), whose sum is σ = 22220686656. Its totient is φ = 5262793776.

The previous prime is 12620959643. The next prime is 12620959691. The reversal of 12620959666 is 66695902621.

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, 12181876 + ... + 12182911.

It is an arithmetic number, because the mean of its divisors is an integer number (1388792916).

Almost surely, 2^12620959666 is an apocalyptic number.

12620959666 is a deficient number, since it is larger than the sum of its proper divisors (9599726990).

12620959666 is a wasteful number, since it uses less digits than its factorization.

12620959666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24364833.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 12620959666 in words is "twelve billion, six hundred twenty million, nine hundred fifty-nine thousand, six hundred sixty-six".