25667161 has 8 divisors (see below), whose sum is σ = 29267784. Its totient is φ = 22298880.

The previous prime is 25667111. The next prime is 25667171. The reversal of 25667161 is 16176652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 866761 + 24800400 = 931^2 + 4980^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25667161 - 2¹¹ = 25665113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25667111) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 57850 + ... + 58291.

It is an arithmetic number, because the mean of its divisors is an integer number (3658473).

Almost surely, 2^25667161 is an apocalyptic number.

It is an amenable number.

25667161 is a deficient number, since it is larger than the sum of its proper divisors (3600623).

25667161 is a wasteful number, since it uses less digits than its factorization.

25667161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116171.

The product of its digits is 15120, while the sum is 34.

The square root of 25667161 is about 5066.2768380735. The cubic root of 25667161 is about 294.9800273752.

The spelling of 25667161 in words is "twenty-five million, six hundred sixty-seven thousand, one hundred sixty-one".