6661953792 has 216 divisors, whose sum is σ = 20907965624. Its totient is φ = 2027814912.

The previous prime is 6661953733. The next prime is 6661953797. The reversal of 6661953792 is 2973591666.

It can be written as a sum of positive squares in 4 ways, for example, as 26873856 + 6635079936 = 5184^2 + 81456^2 .

It is not an unprimeable number, because it can be changed into a prime (6661953797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2904198 + ... + 2906490.

Almost surely, 2^6661953792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6661953792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10453982812).

6661953792 is an abundant number, since it is smaller than the sum of its proper divisors (14246011832).

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

6661953792 is a wasteful number, since it uses less digits than its factorization.

6661953792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 2408 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 6661953792 is about 81620.7926450117. The cubic root of 6661953792 is about 1881.6284547273.

The spelling of 6661953792 in words is "six billion, six hundred sixty-one million, nine hundred fifty-three thousand, seven hundred ninety-two".