517666444 has 12 divisors (see below), whose sum is σ = 906194968. Its totient is φ = 258753600.

The previous prime is 517666421. The next prime is 517666459. The reversal of 517666444 is 444666715.

It is a self number, because there is not a number n which added to its sum of digits gives 517666444.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3837 + ... + 32404.

Almost surely, 2^517666444 is an apocalyptic number.

It is an amenable number.

517666444 is a deficient number, since it is larger than the sum of its proper divisors (388528524).

517666444 is a wasteful number, since it uses less digits than its factorization.

517666444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39816 (or 39814 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 517666444 is about 22752.2843688277. The cubic root of 517666444 is about 802.9404518537.

The spelling of 517666444 in words is "five hundred seventeen million, six hundred sixty-six thousand, four hundred forty-four".