555992661 has 24 divisors (see below), whose sum is σ = 870752064. Its totient is φ = 314616960.

The previous prime is 555992641. The next prime is 555992707. The reversal of 555992661 is 166299555.

It is not a de Polignac number, because 555992661 - 2⁵ = 555992629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 555992661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555992641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3220 + ... + 33501.

It is an arithmetic number, because the mean of its divisors is an integer number (36281336).

Almost surely, 2^555992661 is an apocalyptic number.

It is an amenable number.

555992661 is a deficient number, since it is larger than the sum of its proper divisors (314759403).

555992661 is a wasteful number, since it uses less digits than its factorization.

555992661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36841 (or 36834 counting only the distinct ones).

The product of its digits is 729000, while the sum is 48.

The square root of 555992661 is about 23579.4966231258. The cubic root of 555992661 is about 822.2862338695.

The spelling of 555992661 in words is "five hundred fifty-five million, nine hundred ninety-two thousand, six hundred sixty-one".