6685457 has 8 divisors (see below), whose sum is σ = 6949800. Its totient is φ = 6423424.

The previous prime is 6685447. The next prime is 6685477. The reversal of 6685457 is 7545866.

It can be written as a sum of positive squares in 4 ways, for example, as 1002001 + 5683456 = 1001^2 + 2384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6685457 - 2⁸ = 6685201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6685447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7373 + ... + 8229.

It is an arithmetic number, because the mean of its divisors is an integer number (868725).

Almost surely, 2^6685457 is an apocalyptic number.

It is an amenable number.

6685457 is a deficient number, since it is larger than the sum of its proper divisors (264343).

6685457 is a wasteful number, since it uses less digits than its factorization.

6685457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155.

The product of its digits is 201600, while the sum is 41.

The square root of 6685457 is about 2585.6250694948. The cubic root of 6685457 is about 188.3838637136.

The spelling of 6685457 in words is "six million, six hundred eighty-five thousand, four hundred fifty-seven".