5511506666 has 16 divisors (see below), whose sum is σ = 8606825640. Its totient is φ = 2643775680.

The previous prime is 5511506633. The next prime is 5511506669. The reversal of 5511506666 is 6666051155.

It can be written as a sum of positive squares in 4 ways, for example, as 4479491041 + 1032015625 = 66929^2 + 32125^2 .

It is not an unprimeable number, because it can be changed into a prime (5511506669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293525 + ... + 311736.

Almost surely, 2^5511506666 is an apocalyptic number.

5511506666 is a deficient number, since it is larger than the sum of its proper divisors (3095318974).

5511506666 is a wasteful number, since it uses less digits than its factorization.

5511506666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605449.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 5511506666 is about 74239.5222640879. The cubic root of 5511506666 is about 1766.4042962372.

The spelling of 5511506666 in words is "five billion, five hundred eleven million, five hundred six thousand, six hundred sixty-six".