16865664977 has 8 divisors (see below), whose sum is σ = 19285633536. Its totient is φ = 14448343392.

The previous prime is 16865664961. The next prime is 16865665013. The reversal of 16865664977 is 77946656861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16865664977 - 2⁴ = 16865664961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16865664577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648068 + ... + 673589.

It is an arithmetic number, because the mean of its divisors is an integer number (2410704192).

Almost surely, 2^16865664977 is an apocalyptic number.

It is an amenable number.

16865664977 is a deficient number, since it is larger than the sum of its proper divisors (2419968559).

16865664977 is a wasteful number, since it uses less digits than its factorization.

16865664977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323487.

The product of its digits is 91445760, while the sum is 65.

The spelling of 16865664977 in words is "sixteen billion, eight hundred sixty-five million, six hundred sixty-four thousand, nine hundred seventy-seven".