551686601 has 8 divisors (see below), whose sum is σ = 586010664. Its totient is φ = 517570560.

The previous prime is 551686589. The next prime is 551686609. The reversal of 551686601 is 106686155.

It can be written as a sum of positive squares in 4 ways, for example, as 2253001 + 549433600 = 1501^2 + 23440^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551686601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551686609) by changing a digit.

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, 46520 + ... + 57161.

It is an arithmetic number, because the mean of its divisors is an integer number (73251333).

Almost surely, 2^551686601 is an apocalyptic number.

It is an amenable number.

551686601 is a deficient number, since it is larger than the sum of its proper divisors (34324063).

551686601 is a wasteful number, since it uses less digits than its factorization.

551686601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104011.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 551686601 is about 23488.0097283699. The cubic root of 551686601 is about 820.1579117852.

The spelling of 551686601 in words is "five hundred fifty-one million, six hundred eighty-six thousand, six hundred one".