516551666 has 16 divisors (see below), whose sum is σ = 783305856. Its totient is φ = 255464976.

The previous prime is 516551627. The next prime is 516551699. The reversal of 516551666 is 666155615.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 67655 + ... + 74901.

It is an arithmetic number, because the mean of its divisors is an integer number (48956616).

Almost surely, 2^516551666 is an apocalyptic number.

516551666 is a deficient number, since it is larger than the sum of its proper divisors (266754190).

516551666 is a wasteful number, since it uses less digits than its factorization.

516551666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633.

The product of its digits is 162000, while the sum is 41.

The square root of 516551666 is about 22727.7730101301. The cubic root of 516551666 is about 802.3636688341.

The spelling of 516551666 in words is "five hundred sixteen million, five hundred fifty-one thousand, six hundred sixty-six".