165505650 has 24 divisors (see below), whose sum is σ = 410454384. Its totient is φ = 44134800.

The previous prime is 165505633. The next prime is 165505651. The reversal of 165505650 is 56505561.

165505650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165505651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551536 + ... + 551835.

It is an arithmetic number, because the mean of its divisors is an integer number (17102266).

Almost surely, 2^165505650 is an apocalyptic number.

165505650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165505650 is an abundant number, since it is smaller than the sum of its proper divisors (244948734).

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

165505650 is a wasteful number, since it uses less digits than its factorization.

165505650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103386 (or 1103381 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 165505650 is about 12864.8999218805. The cubic root of 165505650 is about 549.0403651795.

The spelling of 165505650 in words is "one hundred sixty-five million, five hundred five thousand, six hundred fifty".