201660602055 has 32 divisors (see below), whose sum is σ = 352112168448. Its totient is φ = 97740739200.

The previous prime is 201660602053. The next prime is 201660602083. The reversal of 201660602055 is 550206066102.

It is a happy number.

It is not a de Polignac number, because 201660602055 - 2¹ = 201660602053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201660602053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264685 + ... + 688025.

It is an arithmetic number, because the mean of its divisors is an integer number (11003505264).

Almost surely, 2^201660602055 is an apocalyptic number.

201660602055 is a deficient number, since it is larger than the sum of its proper divisors (150451566393).

201660602055 is a wasteful number, since it uses less digits than its factorization.

201660602055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426247.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 201660602055 its reverse (550206066102), we get a palindrome (751866668157).

The spelling of 201660602055 in words is "two hundred one billion, six hundred sixty million, six hundred two thousand, fifty-five".