165940016 has 30 divisors (see below), whose sum is σ = 351098436. Its totient is φ = 75349600.

The previous prime is 165940013. The next prime is 165940081. The reversal of 165940016 is 610049561.

It is not an unprimeable number, because it can be changed into a prime (165940013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 170411 + ... + 171381.

Almost surely, 2^165940016 is an apocalyptic number.

165940016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165940016 is an abundant number, since it is smaller than the sum of its proper divisors (185158420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165940016 is an frugal number, since it uses more digits than its factorization.

165940016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 165940016 is about 12881.7706857404. The cubic root of 165940016 is about 549.5202604549.

Adding to 165940016 its reverse (610049561), we get a palindrome (775989577).

The spelling of 165940016 in words is "one hundred sixty-five million, nine hundred forty thousand, sixteen".