551598066 has 128 divisors (see below), whose sum is σ = 1324646400. Its totient is φ = 169827840.

The previous prime is 551598041. The next prime is 551598119. The reversal of 551598066 is 660895155.

It is a happy number.

551598066 is a `hidden beast` number, since 5 + 51 + 598 + 0 + 6 + 6 = 666.

551598066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5686530 + ... + 5686626.

It is an arithmetic number, because the mean of its divisors is an integer number (10348800).

Almost surely, 2^551598066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551598066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662323200).

551598066 is an abundant number, since it is smaller than the sum of its proper divisors (773048334).

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

551598066 is a wasteful number, since it uses less digits than its factorization.

551598066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 551598066 is about 23486.1249677336. The cubic root of 551598066 is about 820.1140362919.

The spelling of 551598066 in words is "five hundred fifty-one million, five hundred ninety-eight thousand, sixty-six".