551616066 has 24 divisors (see below), whose sum is σ = 1201852080. Its totient is φ = 182843736.

The previous prime is 551616053. The next prime is 551616067. The reversal of 551616066 is 660616155.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 551616066.

It is not an unprimeable number, because it can be changed into a prime (551616067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82380 + ... + 88823.

It is an arithmetic number, because the mean of its divisors is an integer number (50077170).

Almost surely, 2^551616066 is an apocalyptic number.

551616066 is an abundant number, since it is smaller than the sum of its proper divisors (650236014).

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

551616066 is a wasteful number, since it uses less digits than its factorization.

551616066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171390 (or 171387 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 551616066 is about 23486.5081695854. The cubic root of 551616066 is about 820.1229569734.

The spelling of 551616066 in words is "five hundred fifty-one million, six hundred sixteen thousand, sixty-six".