226666031621 has 16 divisors (see below), whose sum is σ = 229201791984. Its totient is φ = 224146427904.

The previous prime is 226666031591. The next prime is 226666031639. The reversal of 226666031621 is 126130666622.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 561026596 + 226105005025 = 23686^2 + 475505^2 .

It is a cyclic number.

It is not a de Polignac number, because 226666031621 - 2¹⁰ = 226666030597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226666030621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60717671 + ... + 60721403.

It is an arithmetic number, because the mean of its divisors is an integer number (14325111999).

Almost surely, 2^226666031621 is an apocalyptic number.

It is an amenable number.

226666031621 is a deficient number, since it is larger than the sum of its proper divisors (2535760363).

226666031621 is a wasteful number, since it uses less digits than its factorization.

226666031621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 226666031621 in words is "two hundred twenty-six billion, six hundred sixty-six million, thirty-one thousand, six hundred twenty-one".