516566065666 has 64 divisors (see below), whose sum is σ = 945301351680. Its totient is φ = 206987477760.

The previous prime is 516566065627. The next prime is 516566065679. The reversal of 516566065666 is 666560665615.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 516566065666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3088156 + ... + 3251128.

It is an arithmetic number, because the mean of its divisors is an integer number (14770333620).

Almost surely, 2^516566065666 is an apocalyptic number.

516566065666 is a deficient number, since it is larger than the sum of its proper divisors (428735286014).

516566065666 is a wasteful number, since it uses less digits than its factorization.

516566065666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163259.

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 516566065666 in words is "five hundred sixteen billion, five hundred sixty-six million, sixty-five thousand, six hundred sixty-six".