201660071655 has 32 divisors (see below), whose sum is σ = 373801227264. Its totient is φ = 90924615936.

The previous prime is 201660071647. The next prime is 201660071719. The reversal of 201660071655 is 556170066102.

It is not a de Polignac number, because 201660071655 - 2³ = 201660071647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13146939 + ... + 13162268.

It is an arithmetic number, because the mean of its divisors is an integer number (11681288352).

Almost surely, 2^201660071655 is an apocalyptic number.

201660071655 is a deficient number, since it is larger than the sum of its proper divisors (172141155609).

201660071655 is a wasteful number, since it uses less digits than its factorization.

201660071655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26309295.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 201660071655 in words is "two hundred one billion, six hundred sixty million, seventy-one thousand, six hundred fifty-five".