556767720 has 96 divisors (see below), whose sum is σ = 1812676320. Its totient is φ = 148210560.

The previous prime is 556767709. The next prime is 556767721. The reversal of 556767720 is 27767655.

556767720 is a `hidden beast` number, since 5 + 567 + 67 + 7 + 20 = 666.

556767720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (556767721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291007 + ... + 292913.

It is an arithmetic number, because the mean of its divisors is an integer number (18882045).

Almost surely, 2^556767720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556767720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906338160).

556767720 is an abundant number, since it is smaller than the sum of its proper divisors (1255908600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556767720 is a wasteful number, since it uses less digits than its factorization.

556767720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The square root of 556767720 is about 23595.9259195311. The cubic root of 556767720 is about 822.6681480424.

The spelling of 556767720 in words is "five hundred fifty-six million, seven hundred sixty-seven thousand, seven hundred twenty".