2661968 has 20 divisors (see below), whose sum is σ = 5336340. Its totient is φ = 1284864.

The previous prime is 2661961. The next prime is 2661991. The reversal of 2661968 is 8691662.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 2155024 = 712^2 + 1468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661961) 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, 2405 + ... + 3332.

It is an arithmetic number, because the mean of its divisors is an integer number (266817).

2^2661968 is an apocalyptic number.

It is an amenable number.

2661968 is an abundant number, since it is smaller than the sum of its proper divisors (2674372).

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

2661968 is a wasteful number, since it uses less digits than its factorization.

2661968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774 (or 5768 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 2661968 is about 1631.5538605881. The cubic root of 2661968 is about 138.5907601491.

The spelling of 2661968 in words is "two million, six hundred sixty-one thousand, nine hundred sixty-eight".