551556066 has 8 divisors (see below), whose sum is σ = 1103112144. Its totient is φ = 183852020.

The previous prime is 551556059. The next prime is 551556113. The reversal of 551556066 is 660655155.

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

551556066 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45963000 + ... + 45963011.

It is an arithmetic number, because the mean of its divisors is an integer number (137889018).

Almost surely, 2^551556066 is an apocalyptic number.

551556066 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.

551556066 is a wasteful number, since it uses less digits than its factorization.

551556066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91926016.

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

The square root of 551556066 is about 23485.2308057639. The cubic root of 551556066 is about 820.0932206135.

The spelling of 551556066 in words is "five hundred fifty-one million, five hundred fifty-six thousand, sixty-six".