6666894 has 32 divisors (see below), whose sum is σ = 15956640. Its totient is φ = 2051136.

The previous prime is 6666883. The next prime is 6666931. The reversal of 6666894 is 4986666.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4047 + ... + 5450.

It is an arithmetic number, because the mean of its divisors is an integer number (498645).

Almost surely, 2^6666894 is an apocalyptic number.

6666894 is an abundant number, since it is smaller than the sum of its proper divisors (9289746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666894 is a wasteful number, since it uses less digits than its factorization.

6666894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9521 (or 9515 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 6666894 is about 2582.0329200070. The cubic root of 6666894 is about 188.2093450405.

The spelling of 6666894 in words is "six million, six hundred sixty-six thousand, eight hundred ninety-four".