25461661 has 8 divisors (see below), whose sum is σ = 26468064. Its totient is φ = 24472080.

The previous prime is 25461649. The next prime is 25461671. The reversal of 25461661 is 16616452.

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 25461661 - 2⁵ = 25461629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25461671) 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 7 ways as a sum of consecutive naturals, for example, 1075 + ... + 7216.

It is an arithmetic number, because the mean of its divisors is an integer number (3308508).

Almost surely, 2^25461661 is an apocalyptic number.

It is an amenable number.

25461661 is a deficient number, since it is larger than the sum of its proper divisors (1006403).

25461661 is an equidigital number, since it uses as much as digits as its factorization.

25461661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8411.

The product of its digits is 8640, while the sum is 31.

The square root of 25461661 is about 5045.9549145826. The cubic root of 25461661 is about 294.1906802893.

The spelling of 25461661 in words is "twenty-five million, four hundred sixty-one thousand, six hundred sixty-one".