16866697896 has 24 divisors (see below), whose sum is σ = 45680640330. Its totient is φ = 5622232608.

The previous prime is 16866697829. The next prime is 16866697949. The reversal of 16866697896 is 69879666861.

It can be written as a sum of positive squares in only one way, i.e., 10183635396 + 6683062500 = 100914^2 + 81750^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (72), and also a Moran number because the ratio is a prime number: 234259693 = 16866697896 / (1 + 6 + 8 + 6 + 6 + 6 + 9 + 7 + 8 + 9 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117129775 + ... + 117129918.

Almost surely, 2^16866697896 is an apocalyptic number.

It is an amenable number.

16866697896 is an abundant number, since it is smaller than the sum of its proper divisors (28813942434).

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

16866697896 is a wasteful number, since it uses less digits than its factorization.

16866697896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234259705 (or 234259698 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 72.

The spelling of 16866697896 in words is "sixteen billion, eight hundred sixty-six million, six hundred ninety-seven thousand, eight hundred ninety-six".