202011171666 has 32 divisors (see below), whose sum is σ = 429268662720. Its totient is φ = 63376044608.

The previous prime is 202011171647. The next prime is 202011171697. The reversal of 202011171666 is 666171110202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3396996 + ... + 3455951.

It is an arithmetic number, because the mean of its divisors is an integer number (13414645710).

Almost surely, 2^202011171666 is an apocalyptic number.

202011171666 is an abundant number, since it is smaller than the sum of its proper divisors (227257491054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202011171666 is an equidigital number, since it uses as much as digits as its factorization.

202011171666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6853003 (or 6852969 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

Adding to 202011171666 its reverse (666171110202), we get a palindrome (868182281868).

The spelling of 202011171666 in words is "two hundred two billion, eleven million, one hundred seventy-one thousand, six hundred sixty-six".