166309840838 has 16 divisors (see below), whose sum is σ = 264146715360. Its totient is φ = 78261215616.

The previous prime is 166309840811. The next prime is 166309840843. The reversal of 166309840838 is 838048903661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276828 + ... + 2348736.

It is an arithmetic number, because the mean of its divisors is an integer number (16509169710).

Almost surely, 2^166309840838 is an apocalyptic number.

166309840838 is a deficient number, since it is larger than the sum of its proper divisors (97836874522).

166309840838 is a wasteful number, since it uses less digits than its factorization.

166309840838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139951.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 166309840838 in words is "one hundred sixty-six billion, three hundred nine million, eight hundred forty thousand, eight hundred thirty-eight".