165670720211 has 8 divisors (see below), whose sum is σ = 181074639744. Its totient is φ = 150895532160.

The previous prime is 165670720181. The next prime is 165670720213. The reversal of 165670720211 is 112027076561.

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

It is a cyclic number.

It is not a de Polignac number, because 165670720211 - 2¹⁴ = 165670703827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165670720213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157182320 + ... + 157183373.

It is an arithmetic number, because the mean of its divisors is an integer number (22634329968).

Almost surely, 2^165670720211 is an apocalyptic number.

165670720211 is a deficient number, since it is larger than the sum of its proper divisors (15403919533).

165670720211 is a wasteful number, since it uses less digits than its factorization.

165670720211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314365741.

The product of its (nonzero) digits is 35280, while the sum is 38.

Adding to 165670720211 its reverse (112027076561), we get a palindrome (277697796772).

The spelling of 165670720211 in words is "one hundred sixty-five billion, six hundred seventy million, seven hundred twenty thousand, two hundred eleven".