520120166 has 4 divisors (see below), whose sum is σ = 780180252. Its totient is φ = 260060082.

The previous prime is 520120163. The next prime is 520120169. The reversal of 520120166 is 661021025.

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

It is an interprime number because it is at equal distance from previous prime (520120163) and next prime (520120169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520120163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130030040 + ... + 130030043.

It is an arithmetic number, because the mean of its divisors is an integer number (195045063).

Almost surely, 2^520120166 is an apocalyptic number.

520120166 is a deficient number, since it is larger than the sum of its proper divisors (260060086).

520120166 is a wasteful number, since it uses less digits than its factorization.

520120166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260060085.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 520120166 is about 22806.1431636303. The cubic root of 520120166 is about 804.2070898356.

The spelling of 520120166 in words is "five hundred twenty million, one hundred twenty thousand, one hundred sixty-six".