503216666 has 8 divisors (see below), whose sum is σ = 755560224. Its totient is φ = 251363260.

The previous prime is 503216663. The next prime is 503216713. The reversal of 503216666 is 666612305.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (503216663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119960 + ... + 124083.

It is an arithmetic number, because the mean of its divisors is an integer number (94445028).

Almost surely, 2^503216666 is an apocalyptic number.

503216666 is a deficient number, since it is larger than the sum of its proper divisors (252343558).

503216666 is a wasteful number, since it uses less digits than its factorization.

503216666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245076.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 503216666 is about 22432.4913016811. The cubic root of 503216666 is about 795.3989353613.

The spelling of 503216666 in words is "five hundred three million, two hundred sixteen thousand, six hundred sixty-six".