506207666 has 8 divisors (see below), whose sum is σ = 759459564. Its totient is φ = 253054480.

The previous prime is 506207641. The next prime is 506207699. The reversal of 506207666 is 666702605.

It can be written as a sum of positive squares in 2 ways, for example, as 498227041 + 7980625 = 22321^2 + 2825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×506207666² = 512492402234335112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10145 + ... + 33396.

Almost surely, 2^506207666 is an apocalyptic number.

506207666 is a deficient number, since it is larger than the sum of its proper divisors (253251898).

506207666 is a wasteful number, since it uses less digits than its factorization.

506207666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49356.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 506207666 is about 22499.0592247765. The cubic root of 506207666 is about 796.9717106687.

The spelling of 506207666 in words is "five hundred six million, two hundred seven thousand, six hundred sixty-six".