511660066 has 16 divisors (see below), whose sum is σ = 779409144. Its totient is φ = 251869824.

The previous prime is 511660049. The next prime is 511660069. The reversal of 511660066 is 660066115.

It can be written as a sum of positive squares in 4 ways, for example, as 308740041 + 202920025 = 17571^2 + 14245^2 .

It is not an unprimeable number, because it can be changed into a prime (511660069) 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, 86640 + ... + 92356.

Almost surely, 2^511660066 is an apocalyptic number.

511660066 is a deficient number, since it is larger than the sum of its proper divisors (267749078).

511660066 is a wasteful number, since it uses less digits than its factorization.

511660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 511660066 is about 22619.9041996203. The cubic root of 511660066 is about 799.8229118443.

The spelling of 511660066 in words is "five hundred eleven million, six hundred sixty thousand, sixty-six".