165553678746 has 12 divisors (see below), whose sum is σ = 358699637322. Its totient is φ = 55184559576.

The previous prime is 165553678733. The next prime is 165553678751. The reversal of 165553678746 is 647876355561.

165553678746 is a `hidden beast` number, since 1 + 6 + 5 + 553 + 6 + 7 + 8 + 74 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 135636787521 + 29916891225 = 368289^2 + 172965^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4598713281 + ... + 4598713316.

Almost surely, 2^165553678746 is an apocalyptic number.

165553678746 is an abundant number, since it is smaller than the sum of its proper divisors (193145958576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165553678746 is a wasteful number, since it uses less digits than its factorization.

165553678746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9197426605 (or 9197426602 counting only the distinct ones).

The product of its digits is 127008000, while the sum is 63.

The spelling of 165553678746 in words is "one hundred sixty-five billion, five hundred fifty-three million, six hundred seventy-eight thousand, seven hundred forty-six".