25706669 has 8 divisors (see below), whose sum is σ = 27470520. Its totient is φ = 23970816.

The previous prime is 25706641. The next prime is 25706683. The reversal of 25706669 is 96660752.

It can be written as a sum of positive squares in 4 ways, for example, as 8773444 + 16933225 = 2962^2 + 4115^2 .

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

It is not a de Polignac number, because 25706669 - 2⁸ = 25706413 is a prime.

It is a super-2 number, since 2×25706669² = 1321665662151122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25706609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5084 + ... + 8789.

It is an arithmetic number, because the mean of its divisors is an integer number (3433815).

Almost surely, 2^25706669 is an apocalyptic number.

It is an amenable number.

25706669 is a deficient number, since it is larger than the sum of its proper divisors (1763851).

25706669 is a wasteful number, since it uses less digits than its factorization.

25706669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13999.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 25706669 is about 5070.1744545923. The cubic root of 25706669 is about 295.1312984429.

The spelling of 25706669 in words is "twenty-five million, seven hundred six thousand, six hundred sixty-nine".