555966561 has 8 divisors (see below), whose sum is σ = 741499360. Its totient is φ = 370539072.

The previous prime is 555966559. The next prime is 555966577. The reversal of 555966561 is 165669555.

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

It is not a de Polignac number, because 555966561 - 2¹ = 555966559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 555966561.

It is not an unprimeable number, because it can be changed into a prime (555964561) 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, 13051 + ... + 35808.

It is an arithmetic number, because the mean of its divisors is an integer number (92687420).

Almost surely, 2^555966561 is an apocalyptic number.

It is an amenable number.

555966561 is a deficient number, since it is larger than the sum of its proper divisors (185532799).

555966561 is a wasteful number, since it uses less digits than its factorization.

555966561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52655.

The product of its digits is 1215000, while the sum is 48.

The square root of 555966561 is about 23578.9431697012. The cubic root of 555966561 is about 822.2733667892.

The spelling of 555966561 in words is "five hundred fifty-five million, nine hundred sixty-six thousand, five hundred sixty-one".