165777980701 has 8 divisors (see below), whose sum is σ = 174884991680. Its totient is φ = 156709155168.

The previous prime is 165777980689. The next prime is 165777980717. The reversal of 165777980701 is 107089777561.

It is a happy number.

165777980701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 165777980701 - 2⁷ = 165777980573 is a prime.

It is a super-2 number, since 2×165777980701² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165777980741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9537441 + ... + 9554806.

It is an arithmetic number, because the mean of its divisors is an integer number (21860623960).

Almost surely, 2^165777980701 is an apocalyptic number.

It is an amenable number.

165777980701 is a deficient number, since it is larger than the sum of its proper divisors (9107010979).

165777980701 is a wasteful number, since it uses less digits than its factorization.

165777980701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19092723.

The product of its (nonzero) digits is 5186160, while the sum is 58.

The spelling of 165777980701 in words is "one hundred sixty-five billion, seven hundred seventy-seven million, nine hundred eighty thousand, seven hundred one".