551666066 has 16 divisors (see below), whose sum is σ = 961218240. Its totient is φ = 232552080.

The previous prime is 551666051. The next prime is 551666081. The reversal of 551666066 is 660666155.

It is an interprime number because it is at equal distance from previous prime (551666051) and next prime (551666081).

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 322136 + ... + 323843.

It is an arithmetic number, because the mean of its divisors is an integer number (60076140).

Almost surely, 2^551666066 is an apocalyptic number.

551666066 is a deficient number, since it is larger than the sum of its proper divisors (409552174).

551666066 is a wasteful number, since it uses less digits than its factorization.

551666066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646049.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 551666066 is about 23487.5725863700. The cubic root of 551666066 is about 820.1477356262.

The spelling of 551666066 in words is "five hundred fifty-one million, six hundred sixty-six thousand, sixty-six".