516066021 has 12 divisors (see below), whose sum is σ = 769475200. Its totient is φ = 332945640.

The previous prime is 516066017. The next prime is 516066053. The reversal of 516066021 is 120660615.

It is a happy number.

516066021 is a `hidden beast` number, since 51 + 6 + 0 + 6 + 602 + 1 = 666.

It is not a de Polignac number, because 516066021 - 2² = 516066017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516016021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 924571 + ... + 925128.

Almost surely, 2^516066021 is an apocalyptic number.

It is an amenable number.

516066021 is a deficient number, since it is larger than the sum of its proper divisors (253409179).

516066021 is a wasteful number, since it uses less digits than its factorization.

516066021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849736 (or 1849733 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 516066021 is about 22717.0865429526. The cubic root of 516066021 is about 802.1121379548.

The spelling of 516066021 in words is "five hundred sixteen million, sixty-six thousand, twenty-one".