166585881630 has 48 divisors (see below), whose sum is σ = 465080587920. Its totient is φ = 38076772608.

The previous prime is 166585881629. The next prime is 166585881643. The reversal of 166585881630 is 36188585661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56660395 + ... + 56663334.

It is an arithmetic number, because the mean of its divisors is an integer number (9689178915).

Almost surely, 2^166585881630 is an apocalyptic number.

166585881630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166585881630 is an abundant number, since it is smaller than the sum of its proper divisors (298494706290).

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

166585881630 is a wasteful number, since it uses less digits than its factorization.

166585881630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113323753 (or 113323746 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 57.

The spelling of 166585881630 in words is "one hundred sixty-six billion, five hundred eighty-five million, eight hundred eighty-one thousand, six hundred thirty".