7666201 has 8 divisors (see below), whose sum is σ = 8202600. Its totient is φ = 7139328.

The previous prime is 7666181. The next prime is 7666213. The reversal of 7666201 is 1026667.

It can be written as a sum of positive squares in 4 ways, for example, as 4206601 + 3459600 = 2051^2 + 1860^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7666201 - 2¹³ = 7658009 is a prime.

It is a Duffinian number.

7666201 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7666201.

It is not an unprimeable number, because it can be changed into a prime (7666261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (1025325).

Almost surely, 2^7666201 is an apocalyptic number.

It is an amenable number.

7666201 is a deficient number, since it is larger than the sum of its proper divisors (536399).

7666201 is a wasteful number, since it uses less digits than its factorization.

7666201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7666201 is about 2768.7905301774. The cubic root of 7666201 is about 197.1787310068.

The spelling of 7666201 in words is "seven million, six hundred sixty-six thousand, two hundred one".