155066065561 has 8 divisors (see below), whose sum is σ = 174996187200. Its totient is φ = 136108145040.

The previous prime is 155066065543. The next prime is 155066065591. The reversal of 155066065561 is 165560660551.

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 155066065561 - 2¹¹ = 155066063513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155066065591) 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, 243049941 + ... + 243050578.

It is an arithmetic number, because the mean of its divisors is an integer number (21874523400).

Almost surely, 2^155066065561 is an apocalyptic number.

155066065561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155066065561 is a deficient number, since it is larger than the sum of its proper divisors (19930121639).

155066065561 is a wasteful number, since it uses less digits than its factorization.

155066065561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486100559.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 155066065561 in words is "one hundred fifty-five billion, sixty-six million, sixty-five thousand, five hundred sixty-one".