2164660 has 12 divisors (see below), whose sum is σ = 4545828. Its totient is φ = 865856.

The previous prime is 2164639. The next prime is 2164681. The reversal of 2164660 is 664612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2164639) and next prime (2164681).

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 972196 = 1092^2 + 986^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54097 + ... + 54136.

It is an arithmetic number, because the mean of its divisors is an integer number (378819).

2^2164660 is an apocalyptic number.

2164660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164660 is an abundant number, since it is smaller than the sum of its proper divisors (2381168).

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

2164660 is a wasteful number, since it uses less digits than its factorization.

2164660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108242 (or 108240 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2164660 is about 1471.2783557166. The cubic root of 2164660 is about 129.3589744983.

The spelling of 2164660 in words is "two million, one hundred sixty-four thousand, six hundred sixty".