2166498 has 24 divisors (see below), whose sum is σ = 4822428. Its totient is φ = 702432.

The previous prime is 2166467. The next prime is 2166509. The reversal of 2166498 is 8946612.

2166498 is a `hidden beast` number, since 2 + 1 + 6 + 649 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1505529 + 660969 = 1227^2 + 813^2 .

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 6³ + 6⁵ + 4⁴ + 9⁵ + 8⁷ .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 961 + ... + 2292.

2^2166498 is an apocalyptic number.

2166498 is an abundant number, since it is smaller than the sum of its proper divisors (2655930).

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

2166498 is a wasteful number, since it uses less digits than its factorization.

2166498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298 (or 3295 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2166498 is about 1471.9028500550. The cubic root of 2166498 is about 129.3955767873.

The spelling of 2166498 in words is "two million, one hundred sixty-six thousand, four hundred ninety-eight".