168666870 has 32 divisors (see below), whose sum is σ = 405912672. Its totient is φ = 44854272.

The previous prime is 168666863. The next prime is 168666893. The reversal of 168666870 is 78666861.

It is a congruent number.

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, 3654 + ... + 18726.

It is an arithmetic number, because the mean of its divisors is an integer number (12684771).

Almost surely, 2^168666870 is an apocalyptic number.

168666870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168666870 is an abundant number, since it is smaller than the sum of its proper divisors (237245802).

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

168666870 is a wasteful number, since it uses less digits than its factorization.

168666870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15456.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 168666870 is about 12987.1809874199. The cubic root of 168666870 is about 552.5139681023.

Subtracting from 168666870 its reverse (78666861), we obtain a palindrome (90000009).

The spelling of 168666870 in words is "one hundred sixty-eight million, six hundred sixty-six thousand, eight hundred seventy".