16668883837 has 4 divisors (see below), whose sum is σ = 16917673216. Its totient is φ = 16420094460.

The previous prime is 16668883831. The next prime is 16668883883. The reversal of 16668883837 is 73838886661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16668883837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668883831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124394589 + ... + 124394722.

It is an arithmetic number, because the mean of its divisors is an integer number (4229418304).

Almost surely, 2^16668883837 is an apocalyptic number.

It is an amenable number.

16668883837 is a deficient number, since it is larger than the sum of its proper divisors (248789379).

16668883837 is an equidigital number, since it uses as much as digits as its factorization.

16668883837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248789378.

The product of its digits is 55738368, while the sum is 64.

The spelling of 16668883837 in words is "sixteen billion, six hundred sixty-eight million, eight hundred eighty-three thousand, eight hundred thirty-seven".