6616145 has 16 divisors (see below), whose sum is σ = 8466768. Its totient is φ = 4945920.

The previous prime is 6616139. The next prime is 6616151. The reversal of 6616145 is 5416166.

It is an interprime number because it is at equal distance from previous prime (6616139) and next prime (6616151).

It can be written as a sum of positive squares in 8 ways, for example, as 961 + 6615184 = 31^2 + 2572^2 .

It is not a de Polignac number, because 6616145 - 2¹⁸ = 6354001 is a prime.

It is a super-2 number, since 2×6616145² = 87546749322050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23405 + ... + 23685.

It is an arithmetic number, because the mean of its divisors is an integer number (529173).

Almost surely, 2^6616145 is an apocalyptic number.

It is an amenable number.

6616145 is a deficient number, since it is larger than the sum of its proper divisors (1850623).

6616145 is a wasteful number, since it uses less digits than its factorization.

6616145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580.

The product of its digits is 4320, while the sum is 29.

The square root of 6616145 is about 2572.1868128112. The cubic root of 6616145 is about 187.7305726401.

The spelling of 6616145 in words is "six million, six hundred sixteen thousand, one hundred forty-five".