5556666678 has 8 divisors (see below), whose sum is σ = 11113333368. Its totient is φ = 1852222224.

The previous prime is 5556666677. The next prime is 5556666683. The reversal of 5556666678 is 8766666555.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

5556666678 is an admirable number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556666671) 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 3 ways as a sum of consecutive naturals, for example, 463055551 + ... + 463055562.

It is an arithmetic number, because the mean of its divisors is an integer number (1389166671).

Almost surely, 2^5556666678 is an apocalyptic number.

5556666678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5556666678 is a wasteful number, since it uses less digits than its factorization.

5556666678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926111118.

The product of its digits is 54432000, while the sum is 60.

The square root of 5556666678 is about 74543.0525132960. The cubic root of 5556666678 is about 1771.2156818122.

The spelling of 5556666678 in words is "five billion, five hundred fifty-six million, six hundred sixty-six thousand, six hundred seventy-eight".