505308666 has 32 divisors (see below), whose sum is σ = 1057380480. Its totient is φ = 160681664.

The previous prime is 505308659. The next prime is 505308709. The reversal of 505308666 is 666803505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48976 + ... + 58388.

It is an arithmetic number, because the mean of its divisors is an integer number (33043140).

Almost surely, 2^505308666 is an apocalyptic number.

505308666 is an abundant number, since it is smaller than the sum of its proper divisors (552071814).

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

505308666 is a wasteful number, since it uses less digits than its factorization.

505308666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9830.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 505308666 is about 22479.0717335036. The cubic root of 505308666 is about 796.4996368684.

The spelling of 505308666 in words is "five hundred five million, three hundred eight thousand, six hundred sixty-six".