165662554342051 has 4 divisors (see below), whose sum is σ = 178405827752992. Its totient is φ = 152919280931112.

The previous prime is 165662554342037. The next prime is 165662554342067. The reversal of 165662554342051 is 150243455266561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165662554342051 - 2¹⁵ = 165662554309283 is a prime.

It is a super-2 number, since 2×165662554342051² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165662554341983 and 165662554342001.

It is not an unprimeable number, because it can be changed into a prime (165662554342151) 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, 6371636705451 + ... + 6371636705476.

It is an arithmetic number, because the mean of its divisors is an integer number (44601456938248).

Almost surely, 2^{165662554342051} is an apocalyptic number.

165662554342051 is a deficient number, since it is larger than the sum of its proper divisors (12743273410941).

165662554342051 is a wasteful number, since it uses less digits than its factorization.

165662554342051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12743273410940.

The product of its (nonzero) digits is 25920000, while the sum is 55.

The spelling of 165662554342051 in words is "one hundred sixty-five trillion, six hundred sixty-two billion, five hundred fifty-four million, three hundred forty-two thousand, fifty-one".