666228201 has 8 divisors (see below), whose sum is σ = 888481920. Its totient is φ = 444063312.

The previous prime is 666228191. The next prime is 666228203. The reversal of 666228201 is 102822666.

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

It is not a de Polignac number, because 666228201 - 2⁵ = 666228169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666228203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2106 + ... + 36563.

It is an arithmetic number, because the mean of its divisors is an integer number (111060240).

Almost surely, 2^666228201 is an apocalyptic number.

It is an amenable number.

666228201 is a deficient number, since it is larger than the sum of its proper divisors (222253719).

666228201 is a wasteful number, since it uses less digits than its factorization.

666228201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44415.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 666228201 is about 25811.3967270274. The cubic root of 666228201 is about 873.3889052136.

The spelling of 666228201 in words is "six hundred sixty-six million, two hundred twenty-eight thousand, two hundred one".