201660668 has 12 divisors (see below), whose sum is σ = 384988632. Its totient is φ = 91663920.

The previous prime is 201660649. The next prime is 201660677. The reversal of 201660668 is 866066102.

It is a congruent number.

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, 2291555 + ... + 2291642.

It is an arithmetic number, because the mean of its divisors is an integer number (32082386).

Almost surely, 2^201660668 is an apocalyptic number.

It is an amenable number.

201660668 is a deficient number, since it is larger than the sum of its proper divisors (183327964).

201660668 is a wasteful number, since it uses less digits than its factorization.

201660668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583212 (or 4583210 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 201660668 is about 14200.7277278314. The cubic root of 201660668 is about 586.4176958082.

The spelling of 201660668 in words is "two hundred one million, six hundred sixty thousand, six hundred sixty-eight".