196662816 has 144 divisors (see below), whose sum is σ = 663009984. Its totient is φ = 56173824.

The previous prime is 196662769. The next prime is 196662821. The reversal of 196662816 is 618266691.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52626 + ... + 56238.

It is an arithmetic number, because the mean of its divisors is an integer number (4604236).

Almost surely, 2^196662816 is an apocalyptic number.

196662816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196662816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331504992).

196662816 is an abundant number, since it is smaller than the sum of its proper divisors (466347168).

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

196662816 is an equidigital number, since it uses as much as digits as its factorization.

196662816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645 (or 3625 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 196662816 is about 14023.6520207826. The cubic root of 196662816 is about 581.5326250940.

The spelling of 196662816 in words is "one hundred ninety-six million, six hundred sixty-two thousand, eight hundred sixteen".