6616291 has 8 divisors (see below), whose sum is σ = 7248384. Its totient is φ = 5989320.

The previous prime is 6616289. The next prime is 6616297. The reversal of 6616291 is 1926166.

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 6616291 - 2¹ = 6616289 is a prime.

6616291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6616297) 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, 1750 + ... + 4036.

It is an arithmetic number, because the mean of its divisors is an integer number (906048).

Almost surely, 2^6616291 is an apocalyptic number.

6616291 is a deficient number, since it is larger than the sum of its proper divisors (632093).

6616291 is a wasteful number, since it uses less digits than its factorization.

6616291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its digits is 3888, while the sum is 31.

The square root of 6616291 is about 2572.2151931749. The cubic root of 6616291 is about 187.7319535279.

The spelling of 6616291 in words is "six million, six hundred sixteen thousand, two hundred ninety-one".