516616665 has 16 divisors (see below), whose sum is σ = 835110528. Its totient is φ = 272687616.

The previous prime is 516616657. The next prime is 516616679. The reversal of 516616665 is 566616615.

It is not a de Polignac number, because 516616665 - 2³ = 516616657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176077 + ... + 178986.

It is an arithmetic number, because the mean of its divisors is an integer number (52194408).

Almost surely, 2^516616665 is an apocalyptic number.

It is an amenable number.

516616665 is a deficient number, since it is larger than the sum of its proper divisors (318493863).

516616665 is a wasteful number, since it uses less digits than its factorization.

516616665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355168.

The product of its digits is 194400, while the sum is 42.

The square root of 516616665 is about 22729.2029116729. The cubic root of 516616665 is about 802.3973219045.

The spelling of 516616665 in words is "five hundred sixteen million, six hundred sixteen thousand, six hundred sixty-five".