1666835016834 has 64 divisors (see below), whose sum is σ = 3715671254400. Its totient is φ = 494951288832.

The previous prime is 1666835016827. The next prime is 1666835016907. The reversal of 1666835016834 is 4386105386661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4605237 + ... + 4953975.

It is an arithmetic number, because the mean of its divisors is an integer number (58057363350).

Almost surely, 2^{1666835016834} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666835016834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857835627200).

1666835016834 is an abundant number, since it is smaller than the sum of its proper divisors (2048836237566).

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

1666835016834 is a wasteful number, since it uses less digits than its factorization.

1666835016834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350899.

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 1666835016834 in words is "one trillion, six hundred sixty-six billion, eight hundred thirty-five million, sixteen thousand, eight hundred thirty-four".