165526650 has 72 divisors (see below), whose sum is σ = 449820540. Its totient is φ = 43633920.

The previous prime is 165526609. The next prime is 165526657. The reversal of 165526650 is 56625561.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 53187849 + 112338801 = 7293^2 + 10599^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165526657) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37984 + ... + 42116.

Almost surely, 2^165526650 is an apocalyptic number.

165526650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165526650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224910270).

165526650 is an abundant number, since it is smaller than the sum of its proper divisors (284293890).

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

165526650 is a wasteful number, since it uses less digits than its factorization.

165526650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240 (or 4232 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 165526650 is about 12865.7160702388. The cubic root of 165526650 is about 549.0635856558.

It can be divided in two parts, 165526 and 650, that added together give a triangular number (166176 = T₅₇₆).

The spelling of 165526650 in words is "one hundred sixty-five million, five hundred twenty-six thousand, six hundred fifty".