2491907166 has 80 divisors (see below), whose sum is σ = 6408361344. Its totient is φ = 711894744.

The previous prime is 2491907149. The next prime is 2491907177. The reversal of 2491907166 is 6617091942.

2491907166 is a `hidden beast` number, since 2 + 491 + 90 + 71 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 271041 + ... + 280083.

Almost surely, 2^2491907166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491907166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3204180672).

2491907166 is an abundant number, since it is smaller than the sum of its proper divisors (3916454178).

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

2491907166 is an frugal number, since it uses more digits than its factorization.

2491907166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9079 (or 9055 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 2491907166 is about 49919.0060598165. The cubic root of 2491907166 is about 1355.7427364556.

The spelling of 2491907166 in words is "two billion, four hundred ninety-one million, nine hundred seven thousand, one hundred sixty-six".