5561550066 has 16 divisors (see below), whose sum is σ = 11140141824. Its totient is φ = 1851009744.

The previous prime is 5561550053. The next prime is 5561550073. The reversal of 5561550066 is 6600551655.

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, 705826 + ... + 713661.

It is an arithmetic number, because the mean of its divisors is an integer number (696258864).

Almost surely, 2^5561550066 is an apocalyptic number.

5561550066 is an abundant number, since it is smaller than the sum of its proper divisors (5578591758).

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

5561550066 is a wasteful number, since it uses less digits than its factorization.

5561550066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420145.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 5561550066 is about 74575.8008069642. The cubic root of 5561550066 is about 1771.7343981164.

The spelling of 5561550066 in words is "five billion, five hundred sixty-one million, five hundred fifty thousand, sixty-six".