2166610 has 8 divisors (see below), whose sum is σ = 3899916. Its totient is φ = 866640.

The previous prime is 2166607. The next prime is 2166613. The reversal of 2166610 is 166612.

It is an interprime number because it is at equal distance from previous prime (2166607) and next prime (2166613).

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 8649 = 1469^2 + 93^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2166613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108321 + ... + 108340.

2^2166610 is an apocalyptic number.

2166610 is a deficient number, since it is larger than the sum of its proper divisors (1733306).

2166610 is a wasteful number, since it uses less digits than its factorization.

2166610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216668.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2166610 is about 1471.9408955525. The cubic root of 2166610 is about 129.3978065078.

The spelling of 2166610 in words is "two million, one hundred sixty-six thousand, six hundred ten".