2645668 has 6 divisors (see below), whose sum is σ = 4629926. Its totient is φ = 1322832.

The previous prime is 2645663. The next prime is 2645681. The reversal of 2645668 is 8665462.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 1127844 = 1232^2 + 1062^2 .

It is not an unprimeable number, because it can be changed into a prime (2645663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330705 + ... + 330712.

2^2645668 is an apocalyptic number.

It is an amenable number.

2645668 is a deficient number, since it is larger than the sum of its proper divisors (1984258).

2645668 is a wasteful number, since it uses less digits than its factorization.

2645668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661421 (or 661419 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 2645668 is about 1626.5509521684. The cubic root of 2645668 is about 138.3073036942.

The spelling of 2645668 in words is "two million, six hundred forty-five thousand, six hundred sixty-eight".