551116661 has 8 divisors (see below), whose sum is σ = 557881344. Its totient is φ = 544382080.

The previous prime is 551116651. The next prime is 551116663. The reversal of 551116661 is 166611155.

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

It is a cyclic number.

It is not a de Polignac number, because 551116661 - 2²² = 546922357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551116663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30476 + ... + 45066.

It is an arithmetic number, because the mean of its divisors is an integer number (69735168).

Almost surely, 2^551116661 is an apocalyptic number.

It is an amenable number.

551116661 is a deficient number, since it is larger than the sum of its proper divisors (6764683).

551116661 is a wasteful number, since it uses less digits than its factorization.

551116661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15051.

The product of its digits is 5400, while the sum is 32.

The square root of 551116661 is about 23475.8740199380. The cubic root of 551116661 is about 819.8753831051.

The spelling of 551116661 in words is "five hundred fifty-one million, one hundred sixteen thousand, six hundred sixty-one".