155515160666 has 32 divisors (see below), whose sum is σ = 243329633280. Its totient is φ = 74458944000.

The previous prime is 155515160653. The next prime is 155515160677. The reversal of 155515160666 is 666061515551.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155515160666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11759690 + ... + 11772906.

It is an arithmetic number, because the mean of its divisors is an integer number (7604051040).

Almost surely, 2^155515160666 is an apocalyptic number.

155515160666 is a deficient number, since it is larger than the sum of its proper divisors (87814472614).

155515160666 is a wasteful number, since it uses less digits than its factorization.

155515160666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15230.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 155515160666 in words is "one hundred fifty-five billion, five hundred fifteen million, one hundred sixty thousand, six hundred sixty-six".