516401066 has 4 divisors (see below), whose sum is σ = 774601602. Its totient is φ = 258200532.

The previous prime is 516401059. The next prime is 516401111. The reversal of 516401066 is 660104615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660104615 = 5 ⋅132020923.

It can be written as a sum of positive squares in only one way, i.e., 401160841 + 115240225 = 20029^2 + 10735^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129100265 + ... + 129100268.

Almost surely, 2^516401066 is an apocalyptic number.

516401066 is a deficient number, since it is larger than the sum of its proper divisors (258200536).

516401066 is a wasteful number, since it uses less digits than its factorization.

516401066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258200535.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 516401066 is about 22724.4596415404. The cubic root of 516401066 is about 802.2856852095.

The spelling of 516401066 in words is "five hundred sixteen million, four hundred one thousand, sixty-six".