165852378 has 24 divisors (see below), whose sum is σ = 366994368. Its totient is φ = 54107592.

The previous prime is 165852361. The next prime is 165852383. The reversal of 165852378 is 873258561.

165852378 is a `hidden beast` number, since 1 + 6 + 58 + 523 + 78 = 666.

It is a super-2 number, since 2×165852378² = 55014022576509768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97176 + ... + 98867.

It is an arithmetic number, because the mean of its divisors is an integer number (15291432).

Almost surely, 2^165852378 is an apocalyptic number.

165852378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165852378 is an abundant number, since it is smaller than the sum of its proper divisors (201141990).

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

165852378 is a wasteful number, since it uses less digits than its factorization.

165852378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196098 (or 196095 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 165852378 is about 12878.3686078633. The cubic root of 165852378 is about 549.4235039315.

The spelling of 165852378 in words is "one hundred sixty-five million, eight hundred fifty-two thousand, three hundred seventy-eight".