6665964554 has 16 divisors (see below), whose sum is σ = 10597667400. Its totient is φ = 3133799424.

The previous prime is 6665964509. The next prime is 6665964583. The reversal of 6665964554 is 4554695666.

It can be written as a sum of positive squares in 4 ways, for example, as 6467858929 + 198105625 = 80423^2 + 14075^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6665964554.

It is an unprimeable number.

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, 62849 + ... + 131460.

Almost surely, 2^6665964554 is an apocalyptic number.

6665964554 is a deficient number, since it is larger than the sum of its proper divisors (3931702846).

6665964554 is a wasteful number, since it uses less digits than its factorization.

6665964554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195337.

The product of its digits is 23328000, while the sum is 56.

The square root of 6665964554 is about 81645.3584351248. The cubic root of 6665964554 is about 1882.0059841109.

The spelling of 6665964554 in words is "six billion, six hundred sixty-five million, nine hundred sixty-four thousand, five hundred fifty-four".