6646338461 has 8 divisors (see below), whose sum is σ = 7687331904. Its totient is φ = 5628224160.

The previous prime is 6646338449. The next prime is 6646338463. The reversal of 6646338461 is 1648336466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6646338461 - 2³⁰ = 5572596637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646338463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5719160 + ... + 5720321.

It is an arithmetic number, because the mean of its divisors is an integer number (960916488).

Almost surely, 2^6646338461 is an apocalyptic number.

It is an amenable number.

6646338461 is a deficient number, since it is larger than the sum of its proper divisors (1040993443).

6646338461 is a wasteful number, since it uses less digits than its factorization.

6646338461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439571.

The product of its digits is 1492992, while the sum is 47.

The square root of 6646338461 is about 81525.0787242797. The cubic root of 6646338461 is about 1880.1571527185.

The spelling of 6646338461 in words is "six billion, six hundred forty-six million, three hundred thirty-eight thousand, four hundred sixty-one".