1966543168 has 84 divisors (see below), whose sum is σ = 4208507712. Its totient is φ = 911197440.

The previous prime is 1966543141. The next prime is 1966543169. The reversal of 1966543168 is 8613456691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966543169) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1084983 + ... + 1086793.

Almost surely, 2^1966543168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966543168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2104253856).

1966543168 is an abundant number, since it is smaller than the sum of its proper divisors (2241964544).

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

1966543168 is a wasteful number, since it uses less digits than its factorization.

1966543168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1879 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 1966543168 is about 44345.7232210729. The cubic root of 1966543168 is about 1252.8560120928.

It can be divided in two parts, 196 and 6543168, that added together give a square (6543364 = 2558²).

The spelling of 1966543168 in words is "one billion, nine hundred sixty-six million, five hundred forty-three thousand, one hundred sixty-eight".