25667081 has 16 divisors (see below), whose sum is σ = 29736960. Its totient is φ = 21908880.

The previous prime is 25667069. The next prime is 25667111. The reversal of 25667081 is 18076652.

It is a cyclic number.

It is not a de Polignac number, because 25667081 - 2¹⁰ = 25666057 is a prime.

It is a super-2 number, since 2×25667081² = 1317598094121122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25667041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26060 + ... + 27026.

It is an arithmetic number, because the mean of its divisors is an integer number (1858560).

Almost surely, 2^25667081 is an apocalyptic number.

It is an amenable number.

25667081 is a deficient number, since it is larger than the sum of its proper divisors (4069879).

25667081 is a wasteful number, since it uses less digits than its factorization.

25667081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 25667081 is about 5066.2689427230. The cubic root of 25667081 is about 294.9797209080.

It can be divided in two parts, 256 and 67081, that multiplied together give a square (17172736 = 4144²).

The spelling of 25667081 in words is "twenty-five million, six hundred sixty-seven thousand, eighty-one".