165220078 has 16 divisors (see below), whose sum is σ = 254232720. Its totient is φ = 80481600.

The previous prime is 165220039. The next prime is 165220079. The reversal of 165220078 is 870022561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165220079) 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, 112513 + ... + 113971.

It is an arithmetic number, because the mean of its divisors is an integer number (15889545).

Almost surely, 2^165220078 is an apocalyptic number.

165220078 is a deficient number, since it is larger than the sum of its proper divisors (89012642).

165220078 is a wasteful number, since it uses less digits than its factorization.

165220078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 165220078 is about 12853.7962485796. The cubic root of 165220078 is about 548.7244025122.

The spelling of 165220078 in words is "one hundred sixty-five million, two hundred twenty thousand, seventy-eight".