505055666 has 16 divisors (see below), whose sum is σ = 796219200. Its totient is φ = 239807568.

The previous prime is 505055657. The next prime is 505055711. The reversal of 505055666 is 666550505.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33101 + ... + 45888.

It is an arithmetic number, because the mean of its divisors is an integer number (49763700).

Almost surely, 2^505055666 is an apocalyptic number.

505055666 is a deficient number, since it is larger than the sum of its proper divisors (291163534).

505055666 is a wasteful number, since it uses less digits than its factorization.

505055666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79153.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 505055666 is about 22473.4435723589. The cubic root of 505055666 is about 796.3666831165.

The spelling of 505055666 in words is "five hundred five million, fifty-five thousand, six hundred sixty-six".