16680211974 has 48 divisors (see below), whose sum is σ = 37410647040. Its totient is φ = 5365661040.

The previous prime is 16680211939. The next prime is 16680212009. The reversal of 16680211974 is 47911208661.

It is an interprime number because it is at equal distance from previous prime (16680211939) and next prime (16680212009).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158689 + ... + 241955.

It is an arithmetic number, because the mean of its divisors is an integer number (779388480).

Almost surely, 2^16680211974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16680211974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18705323520).

16680211974 is an abundant number, since it is smaller than the sum of its proper divisors (20730435066).

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

16680211974 is a wasteful number, since it uses less digits than its factorization.

16680211974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83665 (or 83662 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 16680211974 in words is "sixteen billion, six hundred eighty million, two hundred eleven thousand, nine hundred seventy-four".