165642746 has 8 divisors (see below), whose sum is σ = 250876704. Its totient is φ = 82017180.

The previous prime is 165642739. The next prime is 165642749. The reversal of 165642746 is 647246561.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (165642749) 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, 401840 + ... + 402251.

It is an arithmetic number, because the mean of its divisors is an integer number (31359588).

Almost surely, 2^165642746 is an apocalyptic number.

165642746 is a deficient number, since it is larger than the sum of its proper divisors (85233958).

165642746 is a wasteful number, since it uses less digits than its factorization.

165642746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804196.

The product of its digits is 241920, while the sum is 41.

The square root of 165642746 is about 12870.2271153232. The cubic root of 165642746 is about 549.1919218664.

The spelling of 165642746 in words is "one hundred sixty-five million, six hundred forty-two thousand, seven hundred forty-six".