512198666 has 12 divisors (see below), whose sum is σ = 893734578. Its totient is φ = 219513672.

The previous prime is 512198653. The next prime is 512198669. The reversal of 512198666 is 666891215.

It can be written as a sum of positive squares in only one way, i.e., 369754441 + 142444225 = 19229^2 + 11935^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (512198669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2613161 + ... + 2613356.

Almost surely, 2^512198666 is an apocalyptic number.

512198666 is a deficient number, since it is larger than the sum of its proper divisors (381535912).

512198666 is a wasteful number, since it uses less digits than its factorization.

512198666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226533 (or 5226526 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 512198666 is about 22631.8065120750. The cubic root of 512198666 is about 800.1034584948.

The spelling of 512198666 in words is "five hundred twelve million, one hundred ninety-eight thousand, six hundred sixty-six".