6654606621 has 16 divisors (see below), whose sum is σ = 9813586944. Its totient is φ = 3984462144.

The previous prime is 6654606619. The next prime is 6654606649. The reversal of 6654606621 is 1266064566.

It is a happy number.

6654606621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6654606621 - 2¹ = 6654606619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6654606221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2304381 + ... + 2307266.

It is an arithmetic number, because the mean of its divisors is an integer number (613349184).

Almost surely, 2^6654606621 is an apocalyptic number.

It is an amenable number.

6654606621 is a deficient number, since it is larger than the sum of its proper divisors (3158980323).

6654606621 is a wasteful number, since it uses less digits than its factorization.

6654606621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611700.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 6654606621 is about 81575.7722672608. The cubic root of 6654606621 is about 1880.9364789817.

The spelling of 6654606621 in words is "six billion, six hundred fifty-four million, six hundred six thousand, six hundred twenty-one".