165605630 has 16 divisors (see below), whose sum is σ = 298393200. Its totient is φ = 66174912.

The previous prime is 165605621. The next prime is 165605633. The reversal of 165605630 is 36506561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165605633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2597 + ... + 18383.

It is an arithmetic number, because the mean of its divisors is an integer number (18649575).

Almost surely, 2^165605630 is an apocalyptic number.

165605630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165605630 is a deficient number, since it is larger than the sum of its proper divisors (132787570).

165605630 is a wasteful number, since it uses less digits than its factorization.

165605630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16843.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 165605630 is about 12868.7851019434. The cubic root of 165605630 is about 549.1508991824.

The spelling of 165605630 in words is "one hundred sixty-five million, six hundred five thousand, six hundred thirty".