168397966 has 16 divisors (see below), whose sum is σ = 276721920. Its totient is φ = 76221880.

The previous prime is 168397963. The next prime is 168397967. The reversal of 168397966 is 669793861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168397963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10756 + ... + 21271.

It is an arithmetic number, because the mean of its divisors is an integer number (17295120).

Almost surely, 2^168397966 is an apocalyptic number.

168397966 is a deficient number, since it is larger than the sum of its proper divisors (108323954).

168397966 is a wasteful number, since it uses less digits than its factorization.

168397966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32279.

The product of its digits is 2939328, while the sum is 55.

The square root of 168397966 is about 12976.8241877587. The cubic root of 168397966 is about 552.2201893214.

The spelling of 168397966 in words is "one hundred sixty-eight million, three hundred ninety-seven thousand, nine hundred sixty-six".