6666201 has 12 divisors (see below), whose sum is σ = 9961380. Its totient is φ = 4290720.

The previous prime is 6666173. The next prime is 6666203. The reversal of 6666201 is 1026666.

It can be written as a sum of positive squares in 2 ways, for example, as 3240000 + 3426201 = 1800^2 + 1851^2 .

It is not a de Polignac number, because 6666201 - 2⁶ = 6666137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6666203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12510 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (830115).

Almost surely, 2^6666201 is an apocalyptic number.

It is an amenable number.

6666201 is a deficient number, since it is larger than the sum of its proper divisors (3295179).

6666201 is a wasteful number, since it uses less digits than its factorization.

6666201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25576 (or 25573 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6666201 is about 2581.8987199346. The cubic root of 6666201 is about 188.2028235831.

The spelling of 6666201 in words is "six million, six hundred sixty-six thousand, two hundred one".