6870665 has 4 divisors (see below), whose sum is σ = 8244804. Its totient is φ = 5496528.

The previous prime is 6870653. The next prime is 6870673. The reversal of 6870665 is 5660786.

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 2393209 + 4477456 = 1547^2 + 2116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6870665 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687062 + ... + 687071.

It is an arithmetic number, because the mean of its divisors is an integer number (2061201).

Almost surely, 2^6870665 is an apocalyptic number.

It is an amenable number.

6870665 is a deficient number, since it is larger than the sum of its proper divisors (1374139).

6870665 is a wasteful number, since it uses less digits than its factorization.

6870665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374138.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 6870665 is about 2621.1953380090. The cubic root of 6870665 is about 190.1076490620.

The spelling of 6870665 in words is "six million, eight hundred seventy thousand, six hundred sixty-five".