13645212666 has 8 divisors (see below), whose sum is σ = 27290425344. Its totient is φ = 4548404220.

The previous prime is 13645212649. The next prime is 13645212667. The reversal of 13645212666 is 66621254631.

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

13645212666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (13645212667) 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, 1137101050 + ... + 1137101061.

It is an arithmetic number, because the mean of its divisors is an integer number (3411303168).

Almost surely, 2^13645212666 is an apocalyptic number.

13645212666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13645212666 is a wasteful number, since it uses less digits than its factorization.

13645212666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274202116.

The product of its digits is 311040, while the sum is 42.

The spelling of 13645212666 in words is "thirteen billion, six hundred forty-five million, two hundred twelve thousand, six hundred sixty-six".