1966968880 has 20 divisors (see below), whose sum is σ = 4573202832. Its totient is φ = 786787520.

The previous prime is 1966968859. The next prime is 1966968889. The reversal of 1966968880 is 888696691.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1966968889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12293476 + ... + 12293635.

Almost surely, 2^1966968880 is an apocalyptic number.

1966968880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966968880 is an abundant number, since it is smaller than the sum of its proper divisors (2606233952).

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

1966968880 is a wasteful number, since it uses less digits than its factorization.

1966968880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24587124 (or 24587118 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 61.

The square root of 1966968880 is about 44350.5228830507. The cubic root of 1966968880 is about 1252.9464105418.

The spelling of 1966968880 in words is "one billion, nine hundred sixty-six million, nine hundred sixty-eight thousand, eight hundred eighty".