19660772880 has 960 divisors, whose sum is σ = 84680294400. Its totient is φ = 3986288640.

The previous prime is 19660772863. The next prime is 19660772909. The reversal of 19660772880 is 8827706691.

19660772880 is a `hidden beast` number, since 1 + 9 + 6 + 607 + 7 + 28 + 8 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 109836631 + ... + 109836809.

It is an arithmetic number, because the mean of its divisors is an integer number (88208640).

Almost surely, 2^19660772880 is an apocalyptic number.

19660772880 is a gapful number since it is divisible by the number (10) 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 19660772880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42340147200).

19660772880 is an abundant number, since it is smaller than the sum of its proper divisors (65019521520).

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

19660772880 is a wasteful number, since it uses less digits than its factorization.

19660772880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 19660772880 in words is "nineteen billion, six hundred sixty million, seven hundred seventy-two thousand, eight hundred eighty".