6847661 has 4 divisors (see below), whose sum is σ = 6878592. Its totient is φ = 6816732.

The previous prime is 6847649. The next prime is 6847663. The reversal of 6847661 is 1667486.

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 6847661 - 2⁶ = 6847597 is a prime.

It is a super-2 number, since 2×6847661² = 93780922341842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6847663) 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, 15131 + ... + 15576.

It is an arithmetic number, because the mean of its divisors is an integer number (1719648).

Almost surely, 2^6847661 is an apocalyptic number.

It is an amenable number.

6847661 is a deficient number, since it is larger than the sum of its proper divisors (30931).

6847661 is a wasteful number, since it uses less digits than its factorization.

6847661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30930.

The product of its digits is 48384, while the sum is 38.

The square root of 6847661 is about 2616.8035845283. The cubic root of 6847661 is about 189.8952423442.

The spelling of 6847661 in words is "six million, eight hundred forty-seven thousand, six hundred sixty-one".