165745570 has 16 divisors (see below), whose sum is σ = 306406008. Its totient is φ = 64506240.

The previous prime is 165745553. The next prime is 165745579. The reversal of 165745570 is 75547561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 163098441 + 2647129 = 12771^2 + 1627^2 .

It is not an unprimeable number, because it can be changed into a prime (165745579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223611 + ... + 224350.

Almost surely, 2^165745570 is an apocalyptic number.

165745570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165745570 is a deficient number, since it is larger than the sum of its proper divisors (140660438).

165745570 is a wasteful number, since it uses less digits than its factorization.

165745570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448005.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 165745570 is about 12874.2211414905. The cubic root of 165745570 is about 549.3055367208.

The spelling of 165745570 in words is "one hundred sixty-five million, seven hundred forty-five thousand, five hundred seventy".