6493661 has 4 divisors (see below), whose sum is σ = 6631872. Its totient is φ = 6355452.

The previous prime is 6493631. The next prime is 6493667. The reversal of 6493661 is 1663946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6493661 - 2¹⁴ = 6477277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6493667) 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 3 ways as a sum of consecutive naturals, for example, 69035 + ... + 69128.

It is an arithmetic number, because the mean of its divisors is an integer number (1657968).

Almost surely, 2^6493661 is an apocalyptic number.

It is an amenable number.

6493661 is a deficient number, since it is larger than the sum of its proper divisors (138211).

6493661 is a wasteful number, since it uses less digits than its factorization.

6493661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138210.

The product of its digits is 23328, while the sum is 35.

The square root of 6493661 is about 2548.2662733710. The cubic root of 6493661 is about 186.5648704464.

The spelling of 6493661 in words is "six million, four hundred ninety-three thousand, six hundred sixty-one".