515959966 has 8 divisors (see below), whose sum is σ = 807589584. Its totient is φ = 246763440.

The previous prime is 515959963. The next prime is 515959973. The reversal of 515959966 is 669959515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515959963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5608215 + ... + 5608306.

It is an arithmetic number, because the mean of its divisors is an integer number (100948698).

Almost surely, 2^515959966 is an apocalyptic number.

515959966 is a deficient number, since it is larger than the sum of its proper divisors (291629618).

515959966 is a wasteful number, since it uses less digits than its factorization.

515959966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11216546.

The product of its digits is 3280500, while the sum is 55.

The square root of 515959966 is about 22714.7521668188. The cubic root of 515959966 is about 802.0571877306.

The spelling of 515959966 in words is "five hundred fifteen million, nine hundred fifty-nine thousand, nine hundred sixty-six".