520729166 has 4 divisors (see below), whose sum is σ = 781093752. Its totient is φ = 260364582.

The previous prime is 520729163. The next prime is 520729189. The reversal of 520729166 is 661927025.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520729163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130182290 + ... + 130182293.

It is an arithmetic number, because the mean of its divisors is an integer number (195273438).

Almost surely, 2^520729166 is an apocalyptic number.

520729166 is a deficient number, since it is larger than the sum of its proper divisors (260364586).

520729166 is a wasteful number, since it uses less digits than its factorization.

520729166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260364585.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 520729166 is about 22819.4909233313. The cubic root of 520729166 is about 804.5208449526.

The spelling of 520729166 in words is "five hundred twenty million, seven hundred twenty-nine thousand, one hundred sixty-six".