1631166 has 8 divisors (see below), whose sum is σ = 3262344. Its totient is φ = 543720.

The previous prime is 1631159. The next prime is 1631171. The reversal of 1631166 is 6611361.

It is a sphenic number, since it is the product of 3 distinct primes.

1631166 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

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 3 ways as a sum of consecutive naturals, for example, 135925 + ... + 135936.

It is an arithmetic number, because the mean of its divisors is an integer number (407793).

2^1631166 is an apocalyptic number.

1631166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1631166 is a wasteful number, since it uses less digits than its factorization.

1631166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271866.

The product of its digits is 648, while the sum is 24.

The square root of 1631166 is about 1277.1710926888. The cubic root of 1631166 is about 117.7152475189.

The spelling of 1631166 in words is "one million, six hundred thirty-one thousand, one hundred sixty-six".