2500666 has 48 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 943488.

The previous prime is 2500651. The next prime is 2500669. The reversal of 2500666 is 6660052.

It is a self number, because there is not a number n which added to its sum of digits gives 2500666.

It is not an unprimeable number, because it can be changed into a prime (2500669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31615 + ... + 31693.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2^2500666 is an apocalyptic number.

2500666 is a deficient number, since it is larger than the sum of its proper divisors (2424134).

2500666 is a wasteful number, since it uses less digits than its factorization.

2500666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2500666 is about 1581.3494237518. The cubic root of 2500666 is about 135.7329317739.

The spelling of 2500666 in words is "two million, five hundred thousand, six hundred sixty-six".