226660569921 has 14 divisors (see below), whose sum is σ = 339835396050. Its totient is φ = 151107046128.

The previous prime is 226660569907. The next prime is 226660569991. The reversal of 226660569921 is 129965066622.

It can be written as a sum of positive squares in only one way, i.e., 200109496896 + 26551073025 = 447336^2 + 162945^2 .

It is not a de Polignac number, because 226660569921 - 2⁹ = 226660569409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (226660569991) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 155459196 + ... + 155460653.

Almost surely, 2^226660569921 is an apocalyptic number.

It is an amenable number.

226660569921 is a deficient number, since it is larger than the sum of its proper divisors (113174826129).

226660569921 is an frugal number, since it uses more digits than its factorization.

226660569921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310919867 (or 310919852 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 226660569921 in words is "two hundred twenty-six billion, six hundred sixty million, five hundred sixty-nine thousand, nine hundred twenty-one".