165705121007206 has 64 divisors (see below), whose sum is σ = 285572804256000. Its totient is φ = 71319353212800.

The previous prime is 165705121007191. The next prime is 165705121007207. The reversal of 165705121007206 is 602700121507561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165705121007207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10135481520 + ... + 10135497868.

It is an arithmetic number, because the mean of its divisors is an integer number (4462075066500).

Almost surely, 2^{165705121007206} is an apocalyptic number.

165705121007206 is a deficient number, since it is larger than the sum of its proper divisors (119867683248794).

165705121007206 is a wasteful number, since it uses less digits than its factorization.

165705121007206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27445.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 165705121007206 in words is "one hundred sixty-five trillion, seven hundred five billion, one hundred twenty-one million, seven thousand, two hundred six".