165601630 has 8 divisors (see below), whose sum is σ = 298082952. Its totient is φ = 66240648.

The previous prime is 165601621. The next prime is 165601637. The reversal of 165601630 is 36106561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165601637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8280072 + ... + 8280091.

It is an arithmetic number, because the mean of its divisors is an integer number (37260369).

Almost surely, 2^165601630 is an apocalyptic number.

165601630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165601630 is a deficient number, since it is larger than the sum of its proper divisors (132481322).

165601630 is a wasteful number, since it uses less digits than its factorization.

165601630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16560170.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 165601630 is about 12868.6296861787. The cubic root of 165601630 is about 549.1464777923.

The spelling of 165601630 in words is "one hundred sixty-five million, six hundred one thousand, six hundred thirty".