201245663666 has 8 divisors (see below), whose sum is σ = 301899520560. Its totient is φ = 100612490148.

The previous prime is 201245663639. The next prime is 201245663683. The reversal of 201245663666 is 666366542102.

It is a happy number.

201245663666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201245663666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5146496 + ... + 5185451.

It is an arithmetic number, because the mean of its divisors is an integer number (37737440070).

Almost surely, 2^201245663666 is an apocalyptic number.

201245663666 is a deficient number, since it is larger than the sum of its proper divisors (100653856894).

201245663666 is a wasteful number, since it uses less digits than its factorization.

201245663666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341688.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 201245663666 in words is "two hundred one billion, two hundred forty-five million, six hundred sixty-three thousand, six hundred sixty-six".