6497765 has 4 divisors (see below), whose sum is σ = 7797324. Its totient is φ = 5198208.

The previous prime is 6497761. The next prime is 6497779. The reversal of 6497765 is 5677946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3678724 + 2819041 = 1918^2 + 1679^2 .

It is a cyclic number.

It is not a de Polignac number, because 6497765 - 2² = 6497761 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 (6497761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649772 + ... + 649781.

It is an arithmetic number, because the mean of its divisors is an integer number (1949331).

Almost surely, 2^6497765 is an apocalyptic number.

It is an amenable number.

6497765 is a deficient number, since it is larger than the sum of its proper divisors (1299559).

6497765 is a wasteful number, since it uses less digits than its factorization.

6497765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299558.

The product of its digits is 317520, while the sum is 44.

The square root of 6497765 is about 2549.0713995493. The cubic root of 6497765 is about 186.6041652287.

The spelling of 6497765 in words is "six million, four hundred ninety-seven thousand, seven hundred sixty-five".