6764639 has 4 divisors (see below), whose sum is σ = 7731024. Its totient is φ = 5798256.

The previous prime is 6764633. The next prime is 6764671. The reversal of 6764639 is 9364676.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6764639 - 2¹⁶ = 6699103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6764596 and 6764605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6764633) 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, 483182 + ... + 483195.

It is an arithmetic number, because the mean of its divisors is an integer number (1932756).

Almost surely, 2^6764639 is an apocalyptic number.

6764639 is a deficient number, since it is larger than the sum of its proper divisors (966385).

6764639 is an equidigital number, since it uses as much as digits as its factorization.

6764639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966384.

The product of its digits is 163296, while the sum is 41.

The square root of 6764639 is about 2600.8919623852. The cubic root of 6764639 is about 189.1246809426.

The spelling of 6764639 in words is "six million, seven hundred sixty-four thousand, six hundred thirty-nine".