165611376 has 150 divisors (see below), whose sum is σ = 541825440. Its totient is φ = 47218752.

The previous prime is 165611359. The next prime is 165611389. The reversal of 165611376 is 673116561.

165611376 is a `hidden beast` number, since 1 + 6 + 5 + 611 + 37 + 6 = 666.

It is a super-2 number, since 2×165611376² = 54854255721226752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 165611376.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 345505 + ... + 345983.

Almost surely, 2^165611376 is an apocalyptic number.

165611376 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 165611376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270912720).

165611376 is an abundant number, since it is smaller than the sum of its proper divisors (376214064).

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

165611376 is an equidigital number, since it uses as much as digits as its factorization.

165611376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 491 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 165611376 is about 12869.0083534047. The cubic root of 165611376 is about 549.1572503847.

The spelling of 165611376 in words is "one hundred sixty-five million, six hundred eleven thousand, three hundred seventy-six".