6857657 has 4 divisors (see below), whose sum is σ = 7155840. Its totient is φ = 6559476.

The previous prime is 6857639. The next prime is 6857671. The reversal of 6857657 is 7567586.

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 6857657 - 2⁶ = 6857593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6857687) 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, 149057 + ... + 149102.

It is an arithmetic number, because the mean of its divisors is an integer number (1788960).

Almost surely, 2^6857657 is an apocalyptic number.

It is an amenable number.

6857657 is a deficient number, since it is larger than the sum of its proper divisors (298183).

6857657 is a wasteful number, since it uses less digits than its factorization.

6857657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298182.

The product of its digits is 352800, while the sum is 44.

The square root of 6857657 is about 2618.7128517652. The cubic root of 6857657 is about 189.9875984519.

The spelling of 6857657 in words is "six million, eight hundred fifty-seven thousand, six hundred fifty-seven".