833421666 has 64 divisors (see below), whose sum is σ = 2092262400. Its totient is φ = 215002560.

The previous prime is 833421653. The next prime is 833421713. The reversal of 833421666 is 666124338.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 62785 + ... + 74891.

It is an arithmetic number, because the mean of its divisors is an integer number (32691600).

Almost surely, 2^833421666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 833421666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046131200).

833421666 is an abundant number, since it is smaller than the sum of its proper divisors (1258840734).

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

833421666 is a wasteful number, since it uses less digits than its factorization.

833421666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12279.

The product of its digits is 124416, while the sum is 39.

The square root of 833421666 is about 28869.0433856060. The cubic root of 833421666 is about 941.0692773950.

The spelling of 833421666 in words is "eight hundred thirty-three million, four hundred twenty-one thousand, six hundred sixty-six".