516566066 has 4 divisors (see below), whose sum is σ = 774849102. Its totient is φ = 258283032.

The previous prime is 516566059. The next prime is 516566087. The reversal of 516566066 is 660665615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 390655225 + 125910841 = 19765^2 + 11221^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129141515 + ... + 129141518.

Almost surely, 2^516566066 is an apocalyptic number.

516566066 is a deficient number, since it is larger than the sum of its proper divisors (258283036).

516566066 is a wasteful number, since it uses less digits than its factorization.

516566066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258283035.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 516566066 is about 22728.0898009490. The cubic root of 516566066 is about 802.3711246417.

The spelling of 516566066 in words is "five hundred sixteen million, five hundred sixty-six thousand, sixty-six".