166838628380226 has 48 divisors (see below), whose sum is σ = 366783870231072. Its totient is φ = 50555140123840.

The previous prime is 166838628380191. The next prime is 166838628380309. The reversal of 166838628380226 is 622083826838661.

It is a super-2 number, since 2×166838628380226² (a number of 29 digits) contains 22 as substring.

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, 13642081 + ... + 22798763.

It is an arithmetic number, because the mean of its divisors is an integer number (7641330629814).

Almost surely, 2^{166838628380226} is an apocalyptic number.

166838628380226 is an abundant number, since it is smaller than the sum of its proper divisors (199945241850846).

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

166838628380226 is a wasteful number, since it uses less digits than its factorization.

166838628380226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9181807 (or 9181796 counting only the distinct ones).

The product of its (nonzero) digits is 382205952, while the sum is 69.

The spelling of 166838628380226 in words is "one hundred sixty-six trillion, eight hundred thirty-eight billion, six hundred twenty-eight million, three hundred eighty thousand, two hundred twenty-six".