616611 has 4 divisors (see below), whose sum is σ = 822152. Its totient is φ = 411072.

The previous prime is 616597. The next prime is 616639. The reversal of 616611 is 116616.

616611 is nontrivially palindromic in base 5.

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

It is not a de Polignac number, because 616611 - 2⁵ = 616579 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102766 + ... + 102771.

It is an arithmetic number, because the mean of its divisors is an integer number (205538).

2⁶¹⁶⁶¹¹ is an apocalyptic number.

616611 is a deficient number, since it is larger than the sum of its proper divisors (205541).

616611 is a wasteful number, since it uses less digits than its factorization.

616611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205540.

The product of its digits is 216, while the sum is 21.

The square root of 616611 is about 785.2458213833. The cubic root of 616611 is about 85.1145399332.

The spelling of 616611 in words is "six hundred sixteen thousand, six hundred eleven".