6612581 has 2 divisors, whose sum is σ = 6612582. Its totient is φ = 6612580.

The previous prime is 6612577. The next prime is 6612601. The reversal of 6612581 is 1852166.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6300100 + 312481 = 2510^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 6612581 - 2² = 6612577 is a prime.

It is a super-2 number, since 2×6612581² = 87452454963122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6612181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3306290 + 3306291.

It is an arithmetic number, because the mean of its divisors is an integer number (3306291).

Almost surely, 2^6612581 is an apocalyptic number.

It is an amenable number.

6612581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6612581 is an equidigital number, since it uses as much as digits as its factorization.

6612581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 6612581 is about 2571.4939237727. The cubic root of 6612581 is about 187.6968575419.

The spelling of 6612581 in words is "six million, six hundred twelve thousand, five hundred eighty-one".