225665026691 has 8 divisors (see below), whose sum is σ = 244245103200. Its totient is φ = 207259411392.

The previous prime is 225665026649. The next prime is 225665026703. The reversal of 225665026691 is 196620566522.

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 225665026691 - 2¹⁸ = 225664764547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225665026091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43612610 + ... + 43617783.

It is an arithmetic number, because the mean of its divisors is an integer number (30530637900).

Almost surely, 2^225665026691 is an apocalyptic number.

225665026691 is a deficient number, since it is larger than the sum of its proper divisors (18580076509).

225665026691 is a wasteful number, since it uses less digits than its factorization.

225665026691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87230605.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 225665026691 in words is "two hundred twenty-five billion, six hundred sixty-five million, twenty-six thousand, six hundred ninety-one".