7366566321 has 6 divisors (see below), whose sum is σ = 10640595810. Its totient is φ = 4911044208.

The previous prime is 7366566299. The next prime is 7366566329. The reversal of 7366566321 is 1236656637.

7366566321 is a `hidden beast` number, since 7 + 3 + 6 + 6 + 5 + 6 + 632 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5938860096 + 1427706225 = 77064^2 + 37785^2 .

It is not a de Polignac number, because 7366566321 - 2⁹ = 7366565809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7366566329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 409253676 + ... + 409253693.

It is an arithmetic number, because the mean of its divisors is an integer number (1773432635).

Almost surely, 2^7366566321 is an apocalyptic number.

It is an amenable number.

7366566321 is a deficient number, since it is larger than the sum of its proper divisors (3274029489).

7366566321 is a wasteful number, since it uses less digits than its factorization.

7366566321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818507375 (or 818507372 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 7366566321 is about 85828.7033631524. The cubic root of 7366566321 is about 1945.7559524521.

The spelling of 7366566321 in words is "seven billion, three hundred sixty-six million, five hundred sixty-six thousand, three hundred twenty-one".