516556660654 has 16 divisors (see below), whose sum is σ = 815635460880. Its totient is φ = 244678829760.

The previous prime is 516556660651. The next prime is 516556660693. The reversal of 516556660654 is 456066655615.

It is a junction number, because it is equal to n+sod(n) for n = 516556660595 and 516556660604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516556660651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709442 + ... + 1988794.

It is an arithmetic number, because the mean of its divisors is an integer number (50977216305).

Almost surely, 2^516556660654 is an apocalyptic number.

516556660654 is a deficient number, since it is larger than the sum of its proper divisors (299078800226).

516556660654 is a wasteful number, since it uses less digits than its factorization.

516556660654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328035.

The product of its (nonzero) digits is 19440000, while the sum is 55.

The spelling of 516556660654 in words is "five hundred sixteen billion, five hundred fifty-six million, six hundred sixty thousand, six hundred fifty-four".