6857668 has 6 divisors (see below), whose sum is σ = 12000926. Its totient is φ = 3428832.

The previous prime is 6857639. The next prime is 6857671. The reversal of 6857668 is 8667586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5673924 + 1183744 = 2382^2 + 1088^2 .

It is a super-2 number, since 2×6857668² = 94055220796448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 857205 + ... + 857212.

Almost surely, 2^6857668 is an apocalyptic number.

It is an amenable number.

6857668 is a deficient number, since it is larger than the sum of its proper divisors (5143258).

6857668 is a wasteful number, since it uses less digits than its factorization.

6857668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714421 (or 1714419 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 6857668 is about 2618.7149520328. The cubic root of 6857668 is about 189.9877000348.

It can be divided in two parts, 68576 and 68, that added together give a square (68644 = 262²).

The spelling of 6857668 in words is "six million, eight hundred fifty-seven thousand, six hundred sixty-eight".