6006706721 has 4 divisors (see below), whose sum is σ = 6322849200. Its totient is φ = 5690564244.

The previous prime is 6006706711. The next prime is 6006706757. The reversal of 6006706721 is 1276076006.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1276076006 = 2 ⋅638038003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6006706721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6006706711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158071211 + ... + 158071248.

It is an arithmetic number, because the mean of its divisors is an integer number (1580712300).

Almost surely, 2^6006706721 is an apocalyptic number.

It is an amenable number.

6006706721 is a deficient number, since it is larger than the sum of its proper divisors (316142479).

6006706721 is a wasteful number, since it uses less digits than its factorization.

6006706721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316142478.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 6006706721 is about 77502.9465310836. The cubic root of 6006706721 is about 1817.7973918801.

The spelling of 6006706721 in words is "six billion, six million, seven hundred six thousand, seven hundred twenty-one".