5556666680 has 64 divisors (see below), whose sum is σ = 12591396000. Its totient is φ = 2206923264.

The previous prime is 5556666677. The next prime is 5556666683. The reversal of 5556666680 is 866666555.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5556666677) and next prime (5556666683).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556666683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5009966 + ... + 5011074.

Almost surely, 2^5556666680 is an apocalyptic number.

It is an amenable number.

5556666680 is an abundant number, since it is smaller than the sum of its proper divisors (7034729320).

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

5556666680 is a wasteful number, since it uses less digits than its factorization.

5556666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 53.

The square root of 5556666680 is about 74543.0525267110. The cubic root of 5556666680 is about 1771.2156820247.

The spelling of 5556666680 in words is "five billion, five hundred fifty-six million, six hundred sixty-six thousand, six hundred eighty".