2506668 has 12 divisors (see below), whose sum is σ = 5848920. Its totient is φ = 835552.

The previous prime is 2506661. The next prime is 2506681. The reversal of 2506668 is 8666052.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2506661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104433 + ... + 104456.

It is an arithmetic number, because the mean of its divisors is an integer number (487410).

2^2506668 is an apocalyptic number.

It is an amenable number.

2506668 is an abundant number, since it is smaller than the sum of its proper divisors (3342252).

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

2506668 is a wasteful number, since it uses less digits than its factorization.

2506668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208896 (or 208894 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2506668 is about 1583.2460326810. The cubic root of 2506668 is about 135.8414386204.

The spelling of 2506668 in words is "two million, five hundred six thousand, six hundred sixty-eight".