6499765 has 4 divisors (see below), whose sum is σ = 7799724. Its totient is φ = 5199808.

The previous prime is 6499747. The next prime is 6499793. The reversal of 6499765 is 5679946.

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 925444 + 5574321 = 962^2 + 2361^2 .

It is a cyclic number.

It is not a de Polignac number, because 6499765 - 2⁷ = 6499637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 649972 + ... + 649981.

It is an arithmetic number, because the mean of its divisors is an integer number (1949931).

Almost surely, 2^6499765 is an apocalyptic number.

It is an amenable number.

6499765 is a deficient number, since it is larger than the sum of its proper divisors (1299959).

6499765 is a wasteful number, since it uses less digits than its factorization.

6499765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299958.

The product of its digits is 408240, while the sum is 46.

The square root of 6499765 is about 2549.4636690881. The cubic root of 6499765 is about 186.6233087365.

The spelling of 6499765 in words is "six million, four hundred ninety-nine thousand, seven hundred sixty-five".