520016665 has 24 divisors (see below), whose sum is σ = 727064640. Its totient is φ = 356011488.

The previous prime is 520016657. The next prime is 520016677. The reversal of 520016665 is 566610025.

It is not a de Polignac number, because 520016665 - 2³ = 520016657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200346 + ... + 202924.

It is an arithmetic number, because the mean of its divisors is an integer number (30294360).

Almost surely, 2^520016665 is an apocalyptic number.

It is an amenable number.

520016665 is a deficient number, since it is larger than the sum of its proper divisors (207047975).

520016665 is a wasteful number, since it uses less digits than its factorization.

520016665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421 (or 3414 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 520016665 is about 22803.8739033525. The cubic root of 520016665 is about 804.1537420613.

The spelling of 520016665 in words is "five hundred twenty million, sixteen thousand, six hundred sixty-five".