6497661 has 8 divisors (see below), whose sum is σ = 9040320. Its totient is φ = 4143392.

The previous prime is 6497591. The next prime is 6497683. The reversal of 6497661 is 1667946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6497661 - 2¹⁷ = 6366589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47016 + ... + 47153.

It is an arithmetic number, because the mean of its divisors is an integer number (1130040).

Almost surely, 2^6497661 is an apocalyptic number.

It is an amenable number.

6497661 is a deficient number, since it is larger than the sum of its proper divisors (2542659).

6497661 is a wasteful number, since it uses less digits than its factorization.

6497661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94195.

The product of its digits is 54432, while the sum is 39.

The square root of 6497661 is about 2549.0509998821. The cubic root of 6497661 is about 186.6031696588.

The spelling of 6497661 in words is "six million, four hundred ninety-seven thousand, six hundred sixty-one".