16668316890 has 160 divisors (see below), whose sum is σ = 46984164480. Its totient is φ = 4231979136.

The previous prime is 16668316849. The next prime is 16668316891. The reversal of 16668316890 is 9861386661.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (16668316891) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4264317 + ... + 4268223.

It is an arithmetic number, because the mean of its divisors is an integer number (293651028).

Almost surely, 2^16668316890 is an apocalyptic number.

16668316890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16668316890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23492082240).

16668316890 is an abundant number, since it is smaller than the sum of its proper divisors (30315847590).

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

16668316890 is a wasteful number, since it uses less digits than its factorization.

16668316890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4178 (or 4169 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 16668316890 in words is "sixteen billion, six hundred sixty-eight million, three hundred sixteen thousand, eight hundred ninety".