155666011161 has 8 divisors (see below), whose sum is σ = 214249993984. Its totient is φ = 100429684560.

The previous prime is 155666011159. The next prime is 155666011169. The reversal of 155666011161 is 161110666551.

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

It is not a de Polignac number, because 155666011161 - 2¹ = 155666011159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155666011169) 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, 836913946 + ... + 836914131.

It is an arithmetic number, because the mean of its divisors is an integer number (26781249248).

Almost surely, 2^155666011161 is an apocalyptic number.

It is an amenable number.

155666011161 is a deficient number, since it is larger than the sum of its proper divisors (58583982823).

155666011161 is a wasteful number, since it uses less digits than its factorization.

155666011161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673828111.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 155666011161 in words is "one hundred fifty-five billion, six hundred sixty-six million, eleven thousand, one hundred sixty-one".