515056661 has 8 divisors (see below), whose sum is σ = 607624704. Its totient is φ = 427235760.

The previous prime is 515056657. The next prime is 515056669. The reversal of 515056661 is 166650515.

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

It is not a de Polignac number, because 515056661 - 2² = 515056657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515056669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186550 + ... + 1186983.

It is an arithmetic number, because the mean of its divisors is an integer number (75953088).

Almost surely, 2^515056661 is an apocalyptic number.

It is an amenable number.

515056661 is a deficient number, since it is larger than the sum of its proper divisors (92568043).

515056661 is a wasteful number, since it uses less digits than its factorization.

515056661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373571.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 515056661 is about 22694.8597924728. The cubic root of 515056661 is about 801.5888532800.

The spelling of 515056661 in words is "five hundred fifteen million, fifty-six thousand, six hundred sixty-one".