6616254213 has 12 divisors (see below), whose sum is σ = 9886357260. Its totient is φ = 4258738176.

The previous prime is 6616254181. The next prime is 6616254223. The reversal of 6616254213 is 3124526166.

6616254213 is a `hidden beast` number, since 6 + 6 + 1 + 625 + 4 + 21 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4875111684 + 1741142529 = 69822^2 + 41727^2 .

It is not a de Polignac number, because 6616254213 - 2⁵ = 6616254181 is a prime.

It is a super-2 number, since 2×6616254213² = 87549639622080498738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616254223) 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 11 ways as a sum of consecutive naturals, for example, 12674556 + ... + 12675077.

It is an arithmetic number, because the mean of its divisors is an integer number (823863105).

Almost surely, 2^6616254213 is an apocalyptic number.

It is an amenable number.

6616254213 is a deficient number, since it is larger than the sum of its proper divisors (3270103047).

6616254213 is a wasteful number, since it uses less digits than its factorization.

6616254213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25349668 (or 25349665 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 6616254213 is about 81340.3602954892. The cubic root of 6616254213 is about 1877.3160559340.

The spelling of 6616254213 in words is "six billion, six hundred sixteen million, two hundred fifty-four thousand, two hundred thirteen".