5555550066 has 16 divisors (see below), whose sum is σ = 12121200288. Its totient is φ = 1683500000.

The previous prime is 5555550043. The next prime is 5555550149. The reversal of 5555550066 is 6600555555.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42087435 + ... + 42087566.

It is an arithmetic number, because the mean of its divisors is an integer number (757575018).

Almost surely, 2^5555550066 is an apocalyptic number.

5555550066 is an abundant number, since it is smaller than the sum of its proper divisors (6565650222).

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

5555550066 is a wasteful number, since it uses less digits than its factorization.

5555550066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84175017.

The product of its (nonzero) digits is 562500, while the sum is 42.

The square root of 5555550066 is about 74535.5624249257. The cubic root of 5555550066 is about 1771.0970319518.

The spelling of 5555550066 in words is "five billion, five hundred fifty-five million, five hundred fifty thousand, sixty-six".