165751616 has 28 divisors (see below), whose sum is σ = 343216992. Its totient is φ = 79271808.

The previous prime is 165751609. The next prime is 165751633. The reversal of 165751616 is 616157561.

165751616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×165751616² = 54947196413222912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165751616.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54830 + ... + 57773.

Almost surely, 2^165751616 is an apocalyptic number.

165751616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165751616 is an abundant number, since it is smaller than the sum of its proper divisors (177465376).

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

165751616 is a wasteful number, since it uses less digits than its factorization.

165751616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112638 (or 112628 counting only the distinct ones).

The product of its digits is 37800, while the sum is 38.

The square root of 165751616 is about 12874.4559496703. The cubic root of 165751616 is about 549.3122157549.

The spelling of 165751616 in words is "one hundred sixty-five million, seven hundred fifty-one thousand, six hundred sixteen".