16776661344 has 288 divisors, whose sum is σ = 50807917440. Its totient is φ = 4816834560.

The previous prime is 16776661337. The next prime is 16776661379. The reversal of 16776661344 is 44316667761.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29798407 + ... + 29798969.

It is an arithmetic number, because the mean of its divisors is an integer number (176416380).

Almost surely, 2^16776661344 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 16776661344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25403958720).

16776661344 is an abundant number, since it is smaller than the sum of its proper divisors (34031256096).

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

16776661344 is a wasteful number, since it uses less digits than its factorization.

16776661344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 635 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 51.

The spelling of 16776661344 in words is "sixteen billion, seven hundred seventy-six million, six hundred sixty-one thousand, three hundred forty-four".