556788069 has 6 divisors (see below), whose sum is σ = 804249446. Its totient is φ = 371192040.

The previous prime is 556788061. The next prime is 556788079. The reversal of 556788069 is 960887655.

556788069 is a `hidden beast` number, since 556 + 7 + 8 + 80 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 526151844 + 30636225 = 22938^2 + 5535^2 .

It is not a de Polignac number, because 556788069 - 2³ = 556788061 is a prime.

It is a super-2 number, since 2×556788069² = 620025907561497522, 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 (556788061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30932662 + ... + 30932679.

Almost surely, 2^556788069 is an apocalyptic number.

It is an amenable number.

556788069 is a deficient number, since it is larger than the sum of its proper divisors (247461377).

556788069 is a wasteful number, since it uses less digits than its factorization.

556788069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61865347 (or 61865344 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The square root of 556788069 is about 23596.3571129105. The cubic root of 556788069 is about 822.6781703369.

It can be divided in two parts, 5567 and 88069, that added together give a square (93636 = 306²).

The spelling of 556788069 in words is "five hundred fifty-six million, seven hundred eighty-eight thousand, sixty-nine".