165750000 has 280 divisors, whose sum is σ = 610304688. Its totient is φ = 38400000.

The previous prime is 165749981. The next prime is 165750001. The reversal of 165750000 is 57561.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165750001) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 9749992 + ... + 9750008.

Almost surely, 2^165750000 is an apocalyptic number.

165750000 is a gapful number since it is divisible by the number (10) 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 165750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305152344).

165750000 is an abundant number, since it is smaller than the sum of its proper divisors (444554688).

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

165750000 is an equidigital number, since it uses as much as digits as its factorization.

165750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 165750000 is about 12874.3931895837. The cubic root of 165750000 is about 549.3104305708.

The spelling of 165750000 in words is "one hundred sixty-five million, seven hundred fifty thousand".