168371666216 has 16 divisors (see below), whose sum is σ = 339981249300. Its totient is φ = 77709999744.

The previous prime is 168371666173. The next prime is 168371666227. The reversal of 168371666216 is 612666173861.

It can be written as a sum of positive squares in 2 ways, for example, as 162775130116 + 5596536100 = 403454^2 + 74810^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809479061 + ... + 809479268.

Almost surely, 2^168371666216 is an apocalyptic number.

It is an amenable number.

168371666216 is an abundant number, since it is smaller than the sum of its proper divisors (171609583084).

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

168371666216 is a wasteful number, since it uses less digits than its factorization.

168371666216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618958348 (or 1618958344 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The spelling of 168371666216 in words is "one hundred sixty-eight billion, three hundred seventy-one million, six hundred sixty-six thousand, two hundred sixteen".