1666666846 has 24 divisors (see below), whose sum is σ = 2711027880. Its totient is φ = 768115296.

The previous prime is 1666666843. The next prime is 1666666867. The reversal of 1666666846 is 6486666661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666666843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258085 + ... + 264463.

It is an arithmetic number, because the mean of its divisors is an integer number (112959495).

Almost surely, 2^1666666846 is an apocalyptic number.

1666666846 is a deficient number, since it is larger than the sum of its proper divisors (1044361034).

1666666846 is a wasteful number, since it uses less digits than its factorization.

1666666846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7180 (or 7167 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 55.

The square root of 1666666846 is about 40824.8312427620. The cubic root of 1666666846 is about 1185.6311440213.

The spelling of 1666666846 in words is "one billion, six hundred sixty-six million, six hundred sixty-six thousand, eight hundred forty-six".