515016661 has 8 divisors (see below), whose sum is σ = 517155840. Its totient is φ = 512882832.

The previous prime is 515016659. The next prime is 515016673. The reversal of 515016661 is 166610515.

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

It is a cyclic number.

It is not a de Polignac number, because 515016661 - 2¹ = 515016659 is a prime.

It is a super-2 number, since 2×515016661² = 530484322215177842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515016611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357180 + ... + 358618.

It is an arithmetic number, because the mean of its divisors is an integer number (64644480).

Almost surely, 2^515016661 is an apocalyptic number.

It is an amenable number.

515016661 is a deficient number, since it is larger than the sum of its proper divisors (2139179).

515016661 is a wasteful number, since it uses less digits than its factorization.

515016661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 515016661 is about 22693.9785185410. The cubic root of 515016661 is about 801.5681019164.

The spelling of 515016661 in words is "five hundred fifteen million, sixteen thousand, six hundred sixty-one".