25660730 has 8 divisors (see below), whose sum is σ = 46189332. Its totient is φ = 10264288.

The previous prime is 25660729. The next prime is 25660751. The reversal of 25660730 is 3706652.

It can be written as a sum of positive squares in 2 ways, for example, as 23261329 + 2399401 = 4823^2 + 1549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25660693 and 25660702.

It is an unprimeable number.

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, 1283027 + ... + 1283046.

Almost surely, 2^25660730 is an apocalyptic number.

25660730 is a deficient number, since it is larger than the sum of its proper divisors (20528602).

25660730 is a wasteful number, since it uses less digits than its factorization.

25660730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566080.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 25660730 is about 5065.6421113221. The cubic root of 25660730 is about 294.9553892132.

The spelling of 25660730 in words is "twenty-five million, six hundred sixty thousand, seven hundred thirty".