201660723 has 12 divisors (see below), whose sum is σ = 317768568. Its totient is φ = 122218560.

The previous prime is 201660703. The next prime is 201660727. The reversal of 201660723 is 327066102.

It is a happy number.

201660723 is a `hidden beast` number, since 20 + 16 + 607 + 23 = 666.

It is not a de Polignac number, because 201660723 - 2⁸ = 201660467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201660727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018390 + ... + 1018587.

It is an arithmetic number, because the mean of its divisors is an integer number (26480714).

Almost surely, 2^201660723 is an apocalyptic number.

201660723 is a deficient number, since it is larger than the sum of its proper divisors (116107845).

201660723 is a wasteful number, since it uses less digits than its factorization.

201660723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036994 (or 2036991 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 201660723 is about 14200.7296643518. The cubic root of 201660723 is about 586.4177491205.

The spelling of 201660723 in words is "two hundred one million, six hundred sixty thousand, seven hundred twenty-three".