165880773655 has 16 divisors (see below), whose sum is σ = 199702432800. Its totient is φ = 132274501632.

The previous prime is 165880773637. The next prime is 165880773697. The reversal of 165880773655 is 556377088561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 165880773655 - 2⁵ = 165880773623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165880773593 and 165880773602.

It is a congruent number.

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, 7296496 + ... + 7319194.

It is an arithmetic number, because the mean of its divisors is an integer number (12481402050).

Almost surely, 2^165880773655 is an apocalyptic number.

165880773655 is a deficient number, since it is larger than the sum of its proper divisors (33821659145).

165880773655 is a wasteful number, since it uses less digits than its factorization.

165880773655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27378.

The product of its (nonzero) digits is 42336000, while the sum is 61.

The spelling of 165880773655 in words is "one hundred sixty-five billion, eight hundred eighty million, seven hundred seventy-three thousand, six hundred fifty-five".