551128666 has 8 divisors (see below), whose sum is σ = 901846944. Its totient is φ = 250513020.

The previous prime is 551128657. The next prime is 551128679. The reversal of 551128666 is 666821155.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12525630 + ... + 12525673.

It is an arithmetic number, because the mean of its divisors is an integer number (112730868).

Almost surely, 2^551128666 is an apocalyptic number.

551128666 is a deficient number, since it is larger than the sum of its proper divisors (350718278).

551128666 is a wasteful number, since it uses less digits than its factorization.

551128666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25051316.

The product of its digits is 86400, while the sum is 40.

The square root of 551128666 is about 23476.1297065764. The cubic root of 551128666 is about 819.8813361898.

The spelling of 551128666 in words is "five hundred fifty-one million, one hundred twenty-eight thousand, six hundred sixty-six".