6616537 has 2 divisors, whose sum is σ = 6616538. Its totient is φ = 6616536.

The previous prime is 6616531. The next prime is 6616543. The reversal of 6616537 is 7356166.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6616531) and next prime (6616543).

It can be written as a sum of positive squares in only one way, i.e., 5125696 + 1490841 = 2264^2 + 1221^2 .

It is a cyclic number.

It is not a de Polignac number, because 6616537 - 2³ = 6616529 is a prime.

6616537 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6616531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308268 + 3308269.

It is an arithmetic number, because the mean of its divisors is an integer number (3308269).

Almost surely, 2^6616537 is an apocalyptic number.

It is an amenable number.

6616537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6616537 is an equidigital number, since it uses as much as digits as its factorization.

6616537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 6616537 is about 2572.2630114357. The cubic root of 6616537 is about 187.7342801834.

The spelling of 6616537 in words is "six million, six hundred sixteen thousand, five hundred thirty-seven".