168928871966 has 4 divisors (see below), whose sum is σ = 253393307952. Its totient is φ = 84464435982.

The previous prime is 168928871933. The next prime is 168928872023. The reversal of 168928871966 is 669178829861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669178829861 = 6673 ⋅100281557.

It is a self number, because there is not a number n which added to its sum of digits gives 168928871966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42232217990 + ... + 42232217993.

It is an arithmetic number, because the mean of its divisors is an integer number (63348326988).

Almost surely, 2^168928871966 is an apocalyptic number.

168928871966 is a deficient number, since it is larger than the sum of its proper divisors (84464435986).

168928871966 is an equidigital number, since it uses as much as digits as its factorization.

168928871966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84464435985.

The product of its digits is 125411328, while the sum is 71.

The spelling of 168928871966 in words is "one hundred sixty-eight billion, nine hundred twenty-eight million, eight hundred seventy-one thousand, nine hundred sixty-six".