165065610055501 has 4 divisors (see below), whose sum is σ = 172242375710112. Its totient is φ = 157888844400892.

The previous prime is 165065610055483. The next prime is 165065610055513. The reversal of 165065610055501 is 105550016560561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165065610055501 is a prime.

It is a super-2 number, since 2×165065610055501² (a number of 29 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 (165065610050501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3588382827271 + ... + 3588382827316.

It is an arithmetic number, because the mean of its divisors is an integer number (43060593927528).

Almost surely, 2^{165065610055501} is an apocalyptic number.

It is an amenable number.

165065610055501 is a deficient number, since it is larger than the sum of its proper divisors (7176765654611).

165065610055501 is an equidigital number, since it uses as much as digits as its factorization.

165065610055501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176765654610.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 165065610055501 in words is "one hundred sixty-five trillion, sixty-five billion, six hundred ten million, fifty-five thousand, five hundred one".