6562320666 has 96 divisors (see below), whose sum is σ = 14976783360. Its totient is φ = 1900497600.

The previous prime is 6562320623. The next prime is 6562320731. The reversal of 6562320666 is 6660232656.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5330271 + ... + 5331501.

It is an arithmetic number, because the mean of its divisors is an integer number (156008160).

Almost surely, 2^6562320666 is an apocalyptic number.

6562320666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6562320666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7488391680).

6562320666 is an abundant number, since it is smaller than the sum of its proper divisors (8414462694).

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

6562320666 is a wasteful number, since it uses less digits than its factorization.

6562320666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The square root of 6562320666 is about 81008.1518490578. The cubic root of 6562320666 is about 1872.2010425611.

The spelling of 6562320666 in words is "six billion, five hundred sixty-two million, three hundred twenty thousand, six hundred sixty-six".