521071066 has 16 divisors (see below), whose sum is σ = 786011688. Its totient is φ = 259072000.

The previous prime is 521071013. The next prime is 521071079. The reversal of 521071066 is 660170125.

It can be written as a sum of positive squares in 4 ways, for example, as 507195441 + 13875625 = 22521^2 + 3725^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324666 + ... + 326266.

Almost surely, 2^521071066 is an apocalyptic number.

521071066 is a deficient number, since it is larger than the sum of its proper divisors (264940622).

521071066 is a wasteful number, since it uses less digits than its factorization.

521071066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 521071066 is about 22826.9810969388. The cubic root of 521071066 is about 804.6968836793.

The spelling of 521071066 in words is "five hundred twenty-one million, seventy-one thousand, sixty-six".