666885201 has 16 divisors (see below), whose sum is σ = 907653120. Its totient is φ = 435410640.

The previous prime is 666885181. The next prime is 666885211. The reversal of 666885201 is 102588666.

It is not a de Polignac number, because 666885201 - 2¹³ = 666877009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666885211) 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 15 ways as a sum of consecutive naturals, for example, 41016 + ... + 54918.

It is an arithmetic number, because the mean of its divisors is an integer number (56728320).

Almost surely, 2^666885201 is an apocalyptic number.

It is an amenable number.

666885201 is a deficient number, since it is larger than the sum of its proper divisors (240767919).

666885201 is a wasteful number, since it uses less digits than its factorization.

666885201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14236.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 666885201 is about 25824.1205271351. The cubic root of 666885201 is about 873.6759079705.

The spelling of 666885201 in words is "six hundred sixty-six million, eight hundred eighty-five thousand, two hundred one".