6206661556 has 6 divisors (see below), whose sum is σ = 10861657730. Its totient is φ = 3103330776.

The previous prime is 6206661551. The next prime is 6206661641. The reversal of 6206661556 is 6551666026.

It can be written as a sum of positive squares in only one way, i.e., 3245125156 + 2961536400 = 56966^2 + 54420^2 .

It is a super-2 number, since 2×6206661556² = 77045295341456682272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6206661551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775832691 + ... + 775832698.

Almost surely, 2^6206661556 is an apocalyptic number.

It is an amenable number.

6206661556 is a deficient number, since it is larger than the sum of its proper divisors (4654996174).

6206661556 is a wasteful number, since it uses less digits than its factorization.

6206661556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551665393 (or 1551665391 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 6206661556 is about 78782.3683066205. The cubic root of 6206661556 is about 1837.7482651333.

The spelling of 6206661556 in words is "six billion, two hundred six million, six hundred sixty-one thousand, five hundred fifty-six".