551051165661 has 8 divisors (see below), whose sum is σ = 735783014304. Its totient is φ = 366843380400.

The previous prime is 551051165611. The next prime is 551051165671. The reversal of 551051165661 is 166561150155.

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

It is not a de Polignac number, because 551051165661 - 2⁹ = 551051165149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551051165611) 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, 131013391 + ... + 131017596.

It is an arithmetic number, because the mean of its divisors is an integer number (91972876788).

Almost surely, 2^551051165661 is an apocalyptic number.

It is an amenable number.

551051165661 is a deficient number, since it is larger than the sum of its proper divisors (184731848643).

551051165661 is a wasteful number, since it uses less digits than its factorization.

551051165661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262031691.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 551051165661 in words is "five hundred fifty-one billion, fifty-one million, one hundred sixty-five thousand, six hundred sixty-one".