505500666 has 16 divisors (see below), whose sum is σ = 1102910688. Its totient is φ = 153182000.

The previous prime is 505500631. The next prime is 505500673. The reversal of 505500666 is 666005505.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon 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, 3829485 + ... + 3829616.

It is an arithmetic number, because the mean of its divisors is an integer number (68931918).

Almost surely, 2^505500666 is an apocalyptic number.

505500666 is an abundant number, since it is smaller than the sum of its proper divisors (597410022).

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

505500666 is a wasteful number, since it uses less digits than its factorization.

505500666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659117.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 505500666 is about 22483.3419668874. The cubic root of 505500666 is about 796.6005049619.

The spelling of 505500666 in words is "five hundred five million, five hundred thousand, six hundred sixty-six".