6616243499 has 4 divisors (see below), whose sum is σ = 6741078336. Its totient is φ = 6491408664.

The previous prime is 6616243493. The next prime is 6616243507. The reversal of 6616243499 is 9943426166.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6616243499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6616243493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62417339 + ... + 62417444.

It is an arithmetic number, because the mean of its divisors is an integer number (1685269584).

Almost surely, 2^6616243499 is an apocalyptic number.

6616243499 is a deficient number, since it is larger than the sum of its proper divisors (124834837).

6616243499 is a wasteful number, since it uses less digits than its factorization.

6616243499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124834836.

The product of its digits is 1679616, while the sum is 50.

The square root of 6616243499 is about 81340.2944363985. The cubic root of 6616243499 is about 1877.3150425925.

The spelling of 6616243499 in words is "six billion, six hundred sixteen million, two hundred forty-three thousand, four hundred ninety-nine".