25146666 has 16 divisors (see below), whose sum is σ = 55881600. Its totient is φ = 8382204.

The previous prime is 25146647. The next prime is 25146691. The reversal of 25146666 is 66664152.

It is a happy number.

25146666 is a modest number, since divided by 6666 gives 2514 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25146666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232786 + ... + 232893.

It is an arithmetic number, because the mean of its divisors is an integer number (3492600).

Almost surely, 2^25146666 is an apocalyptic number.

25146666 is an abundant number, since it is smaller than the sum of its proper divisors (30734934).

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

25146666 is a wasteful number, since it uses less digits than its factorization.

25146666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465690 (or 465684 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 25146666 is about 5014.6451519524. The cubic root of 25146666 is about 292.9724645737.

It can be divided in two parts, 2514 and 6666, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 25146666 in words is "twenty-five million, one hundred forty-six thousand, six hundred sixty-six".