171142237666 has 16 divisors (see below), whose sum is σ = 257156004600. Its totient is φ = 85423621248.

The previous prime is 171142237663. The next prime is 171142237691. The reversal of 171142237666 is 666732241171.

171142237666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 126395181441 + 44747056225 = 355521^2 + 211535^2 .

It is not an unprimeable number, because it can be changed into a prime (171142237661) 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 7 ways as a sum of consecutive naturals, for example, 9536590 + ... + 9554518.

Almost surely, 2^171142237666 is an apocalyptic number.

171142237666 is a deficient number, since it is larger than the sum of its proper divisors (86013766934).

171142237666 is a wasteful number, since it uses less digits than its factorization.

171142237666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25893.

The product of its digits is 508032, while the sum is 46.

The spelling of 171142237666 in words is "one hundred seventy-one billion, one hundred forty-two million, two hundred thirty-seven thousand, six hundred sixty-six".