165660411 has 16 divisors (see below), whose sum is σ = 265721600. Its totient is φ = 89680608.

The previous prime is 165660361. The next prime is 165660413. The reversal of 165660411 is 114066561.

It is not a de Polignac number, because 165660411 - 2¹⁹ = 165136123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165660413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207196 + ... + 207993.

It is an arithmetic number, because the mean of its divisors is an integer number (16607600).

Almost surely, 2^165660411 is an apocalyptic number.

165660411 is a deficient number, since it is larger than the sum of its proper divisors (100061189).

165660411 is a wasteful number, since it uses less digits than its factorization.

165660411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415218.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 165660411 is about 12870.9133708529. The cubic root of 165660411 is about 549.2114440623.

The spelling of 165660411 in words is "one hundred sixty-five million, six hundred sixty thousand, four hundred eleven".