556799986 has 4 divisors (see below), whose sum is σ = 835199982. Its totient is φ = 278399992.

The previous prime is 556799977. The next prime is 556799987. The reversal of 556799986 is 689997655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 525830761 + 30969225 = 22931^2 + 5565^2 .

It is not an unprimeable number, because it can be changed into a prime (556799987) 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 as a sum of consecutive naturals, namely, 139199995 + ... + 139199998.

Almost surely, 2^556799986 is an apocalyptic number.

556799986 is a deficient number, since it is larger than the sum of its proper divisors (278399996).

556799986 is a wasteful number, since it uses less digits than its factorization.

556799986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278399995.

The product of its digits is 36741600, while the sum is 64.

The square root of 556799986 is about 23596.6096293514. The cubic root of 556799986 is about 822.6840395873.

The spelling of 556799986 in words is "five hundred fifty-six million, seven hundred ninety-nine thousand, nine hundred eighty-six".