165278976 has 72 divisors (see below), whose sum is σ = 441945504. Its totient is φ = 54835200.

The previous prime is 165278969. The next prime is 165278977. The reversal of 165278976 is 679872561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165278977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235426 + ... + 236126.

It is an arithmetic number, because the mean of its divisors is an integer number (6138132).

Almost surely, 2^165278976 is an apocalyptic number.

165278976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165278976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220972752).

165278976 is an abundant number, since it is smaller than the sum of its proper divisors (276666528).

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

165278976 is an equidigital number, since it uses as much as digits as its factorization.

165278976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1013 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 165278976 is about 12856.0871185598. The cubic root of 165278976 is about 548.7895982411.

The spelling of 165278976 in words is "one hundred sixty-five million, two hundred seventy-eight thousand, nine hundred seventy-six".