6357661 has 2 divisors, whose sum is σ = 6357662. Its totient is φ = 6357660.

The previous prime is 6357653. The next prime is 6357667. The reversal of 6357661 is 1667536.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 2785561 = 1890^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 6357661 - 2³ = 6357653 is a prime.

6357661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6357667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3178830 + 3178831.

It is an arithmetic number, because the mean of its divisors is an integer number (3178831).

Almost surely, 2^6357661 is an apocalyptic number.

It is an amenable number.

6357661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6357661 is an equidigital number, since it uses as much as digits as its factorization.

6357661 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6357661 is about 2521.4402630243. The cubic root of 6357661 is about 185.2532300378.

The spelling of 6357661 in words is "six million, three hundred fifty-seven thousand, six hundred sixty-one".