165741775705 has 16 divisors (see below), whose sum is σ = 224452814400. Its totient is φ = 116382938560.

The previous prime is 165741775699. The next prime is 165741775867. The reversal of 165741775705 is 507577147561.

It is not a de Polignac number, because 165741775705 - 2¹⁵ = 165741742937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

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, 51955075 + ... + 51958264.

It is an arithmetic number, because the mean of its divisors is an integer number (14028300900).

Almost surely, 2^165741775705 is an apocalyptic number.

It is an amenable number.

165741775705 is a deficient number, since it is larger than the sum of its proper divisors (58711038695).

165741775705 is a wasteful number, since it uses less digits than its factorization.

165741775705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103913384.

The product of its (nonzero) digits is 7203000, while the sum is 55.

The spelling of 165741775705 in words is "one hundred sixty-five billion, seven hundred forty-one million, seven hundred seventy-five thousand, seven hundred five".