505335666 has 64 divisors (see below), whose sum is σ = 1175500800. Its totient is φ = 143208000.

The previous prime is 505335653. The next prime is 505335689. The reversal of 505335666 is 666533505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96516 + ... + 101616.

It is an arithmetic number, because the mean of its divisors is an integer number (18367200).

Almost surely, 2^505335666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505335666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (587750400).

505335666 is an abundant number, since it is smaller than the sum of its proper divisors (670165134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505335666 is a wasteful number, since it uses less digits than its factorization.

505335666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215.

The product of its (nonzero) digits is 243000, while the sum is 39.

The square root of 505335666 is about 22479.6722840881. The cubic root of 505335666 is about 796.5138229878.

The spelling of 505335666 in words is "five hundred five million, three hundred thirty-five thousand, six hundred sixty-six".