6616161 has 24 divisors (see below), whose sum is σ = 10439520. Its totient is φ = 4175712.

The previous prime is 6616151. The next prime is 6616163. The reversal of 6616161 is 1616166.

It is not a de Polignac number, because 6616161 - 2⁷ = 6616033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6616163) 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 23 ways as a sum of consecutive naturals, for example, 3901 + ... + 5333.

It is an arithmetic number, because the mean of its divisors is an integer number (434980).

Almost surely, 2^6616161 is an apocalyptic number.

It is an amenable number.

6616161 is a deficient number, since it is larger than the sum of its proper divisors (3823359).

6616161 is a wasteful number, since it uses less digits than its factorization.

6616161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1455 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 6616161 is about 2572.1899230034. The cubic root of 6616161 is about 187.7307239713.

The spelling of 6616161 in words is "six million, six hundred sixteen thousand, one hundred sixty-one".