25226661 has 8 divisors (see below), whose sum is σ = 35405920. Its totient is φ = 15932592.

The previous prime is 25226659. The next prime is 25226717. The reversal of 25226661 is 16662252.

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

It is not a de Polignac number, because 25226661 - 2¹ = 25226659 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 (25226651) 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, 221230 + ... + 221343.

It is an arithmetic number, because the mean of its divisors is an integer number (4425740).

Almost surely, 2^25226661 is an apocalyptic number.

It is an amenable number.

25226661 is a deficient number, since it is larger than the sum of its proper divisors (10179259).

25226661 is a wasteful number, since it uses less digits than its factorization.

25226661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442595.

The product of its digits is 8640, while the sum is 30.

The square root of 25226661 is about 5022.6149563748. The cubic root of 25226661 is about 293.2827976245.

The spelling of 25226661 in words is "twenty-five million, two hundred twenty-six thousand, six hundred sixty-one".