516668503 has 4 divisors (see below), whose sum is σ = 556412248. Its totient is φ = 476924760.

The previous prime is 516668489. The next prime is 516668507. The reversal of 516668503 is 305866615.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-516668503 is a prime.

It is a super-2 number, since 2×516668503² = 533892683984522018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516668507) 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, 19871853 + ... + 19871878.

It is an arithmetic number, because the mean of its divisors is an integer number (139103062).

Almost surely, 2^516668503 is an apocalyptic number.

516668503 is a deficient number, since it is larger than the sum of its proper divisors (39743745).

516668503 is a wasteful number, since it uses less digits than its factorization.

516668503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39743744.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 516668503 is about 22730.3432222217. The cubic root of 516668503 is about 802.4241588767.

The spelling of 516668503 in words is "five hundred sixteen million, six hundred sixty-eight thousand, five hundred three".