6431166 has 48 divisors (see below), whose sum is σ = 16308864. Its totient is φ = 1793232.

The previous prime is 6431141. The next prime is 6431171. The reversal of 6431166 is 6611346.

6431166 is a `hidden beast` number, since 643 + 1 + 16 + 6 = 666.

It is a super-2 number, since 2×6431166² = 82719792239112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4825 + ... + 6011.

It is an arithmetic number, because the mean of its divisors is an integer number (339768).

Almost surely, 2^6431166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6431166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8154432).

6431166 is an abundant number, since it is smaller than the sum of its proper divisors (9877698).

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

6431166 is a wasteful number, since it uses less digits than its factorization.

6431166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1242 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 6431166 is about 2535.9743689556. The cubic root of 6431166 is about 185.9644399588.

The spelling of 6431166 in words is "six million, four hundred thirty-one thousand, one hundred sixty-six".