6660602021 has 8 divisors (see below), whose sum is σ = 6717332160. Its totient is φ = 6603989728.

The previous prime is 6660601973. The next prime is 6660602041. The reversal of 6660602021 is 1202060666.

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 6660602021 - 2¹⁰ = 6660600997 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 (6660602041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85970 + ... + 143916.

It is an arithmetic number, because the mean of its divisors is an integer number (839666520).

Almost surely, 2^6660602021 is an apocalyptic number.

It is an amenable number.

6660602021 is a deficient number, since it is larger than the sum of its proper divisors (56730139).

6660602021 is a wasteful number, since it uses less digits than its factorization.

6660602021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58923.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6660602021 is about 81612.5114244134. The cubic root of 6660602021 is about 1881.5011796109.

Adding to 6660602021 its reverse (1202060666), we get a palindrome (7862662687).

The spelling of 6660602021 in words is "six billion, six hundred sixty million, six hundred two thousand, twenty-one".