25380666 has 12 divisors (see below), whose sum is σ = 54991482. Its totient is φ = 8460216.

The previous prime is 25380647. The next prime is 25380671. The reversal of 25380666 is 66608352.

It can be written as a sum of positive squares in only one way, i.e., 19105641 + 6275025 = 4371^2 + 2505^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25380666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 705001 + ... + 705036.

Almost surely, 2^25380666 is an apocalyptic number.

25380666 is an abundant number, since it is smaller than the sum of its proper divisors (29610816).

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

25380666 is a wasteful number, since it uses less digits than its factorization.

25380666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410045 (or 1410042 counting only the distinct ones).

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

The square root of 25380666 is about 5037.9227862285. The cubic root of 25380666 is about 293.8784031373.

The spelling of 25380666 in words is "twenty-five million, three hundred eighty thousand, six hundred sixty-six".