551601666149 has 8 divisors (see below), whose sum is σ = 554054331168. Its totient is φ = 549149200720.

The previous prime is 551601666139. The next prime is 551601666157. The reversal of 551601666149 is 941666106155.

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 551601666149 - 2²⁰ = 551600617573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 551601666097 and 551601666106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551601666139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9691994 + ... + 9748740.

It is an arithmetic number, because the mean of its divisors is an integer number (69256791396).

Almost surely, 2^551601666149 is an apocalyptic number.

It is an amenable number.

551601666149 is a deficient number, since it is larger than the sum of its proper divisors (2452665019).

551601666149 is a wasteful number, since it uses less digits than its factorization.

551601666149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99795.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 551601666149 in words is "five hundred fifty-one billion, six hundred one million, six hundred sixty-six thousand, one hundred forty-nine".