16776677673 has 18 divisors (see below), whose sum is σ = 28189384314. Its totient is φ = 9586672704.

The previous prime is 16776677669. The next prime is 16776677693. The reversal of 16776677673 is 37677667761.

It can be written as a sum of positive squares in only one way, i.e., 15366825369 + 1409852304 = 123963^2 + 37548^2 .

It is not a de Polignac number, because 16776677673 - 2² = 16776677669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 16776677673.

It is not an unprimeable number, because it can be changed into a prime (16776677623) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19020736 + ... + 19021617.

Almost surely, 2^16776677673 is an apocalyptic number.

It is an amenable number.

16776677673 is a deficient number, since it is larger than the sum of its proper divisors (11412706641).

16776677673 is a wasteful number, since it uses less digits than its factorization.

16776677673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38042373 (or 38042363 counting only the distinct ones).

The product of its digits is 65345616, while the sum is 63.

The spelling of 16776677673 in words is "sixteen billion, seven hundred seventy-six million, six hundred seventy-seven thousand, six hundred seventy-three".