6660654213 has 32 divisors (see below), whose sum is σ = 9592909056. Its totient is φ = 4095157248.

The previous prime is 6660654211. The next prime is 6660654223. The reversal of 6660654213 is 3124560666.

It is not a de Polignac number, because 6660654213 - 2¹ = 6660654211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660654211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4169931 + ... + 4171527.

It is an arithmetic number, because the mean of its divisors is an integer number (299778408).

Almost surely, 2^6660654213 is an apocalyptic number.

It is an amenable number.

6660654213 is a deficient number, since it is larger than the sum of its proper divisors (2932254843).

6660654213 is a wasteful number, since it uses less digits than its factorization.

6660654213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 6660654213 is about 81612.8311786817. The cubic root of 6660654213 is about 1881.5060940342.

The spelling of 6660654213 in words is "six billion, six hundred sixty million, six hundred fifty-four thousand, two hundred thirteen".