500061666 has 64 divisors (see below), whose sum is σ = 1109316096. Its totient is φ = 149299200.

The previous prime is 500061631. The next prime is 500061671. The reversal of 500061666 is 666160005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 866370 + ... + 866946.

It is an arithmetic number, because the mean of its divisors is an integer number (17333064).

Almost surely, 2^500061666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 500061666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554658048).

500061666 is an abundant number, since it is smaller than the sum of its proper divisors (609254430).

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

500061666 is a wasteful number, since it uses less digits than its factorization.

500061666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 500061666 is about 22362.0586261641. The cubic root of 500061666 is about 793.7331542005.

It can be divided in two parts, 5000 and 61666, that added together give a palindrome (66666).

The spelling of 500061666 in words is "five hundred million, sixty-one thousand, six hundred sixty-six".