165345550 has 12 divisors (see below), whose sum is σ = 307542816. Its totient is φ = 66138200.

The previous prime is 165345541. The next prime is 165345569. The reversal of 165345550 is 55543561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1653406 + ... + 1653505.

It is an arithmetic number, because the mean of its divisors is an integer number (25628568).

Almost surely, 2^165345550 is an apocalyptic number.

165345550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165345550 is a deficient number, since it is larger than the sum of its proper divisors (142197266).

165345550 is a wasteful number, since it uses less digits than its factorization.

165345550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306923 (or 3306918 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 165345550 is about 12858.6760593772. The cubic root of 165345550 is about 548.8632720890.

The spelling of 165345550 in words is "one hundred sixty-five million, three hundred forty-five thousand, five hundred fifty".