6606481421 has 4 divisors (see below), whose sum is σ = 6606771132. Its totient is φ = 6606191712.

The previous prime is 6606481417. The next prime is 6606481433. The reversal of 6606481421 is 1241846066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4436226025 + 2170255396 = 66605^2 + 46586^2 .

It is a cyclic number.

It is not a de Polignac number, because 6606481421 - 2² = 6606481417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606481411) 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, 107426 + ... + 157331.

It is an arithmetic number, because the mean of its divisors is an integer number (1651692783).

Almost surely, 2^6606481421 is an apocalyptic number.

It is an amenable number.

6606481421 is a deficient number, since it is larger than the sum of its proper divisors (289711).

6606481421 is a wasteful number, since it uses less digits than its factorization.

6606481421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289710.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 6606481421 is about 81280.2646464688. The cubic root of 6606481421 is about 1876.3912799024.

The spelling of 6606481421 in words is "six billion, six hundred six million, four hundred eighty-one thousand, four hundred twenty-one".