165670471 has 4 divisors (see below), whose sum is σ = 167378512. Its totient is φ = 163962432.

The previous prime is 165670469. The next prime is 165670487. The reversal of 165670471 is 174076561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165670471 - 2¹ = 165670469 is a prime.

It is a super-3 number, since 3×165670471³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165670471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165676471) 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 3 ways as a sum of consecutive naturals, for example, 853875 + ... + 854068.

It is an arithmetic number, because the mean of its divisors is an integer number (41844628).

Almost surely, 2^165670471 is an apocalyptic number.

165670471 is a deficient number, since it is larger than the sum of its proper divisors (1708041).

165670471 is an equidigital number, since it uses as much as digits as its factorization.

165670471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708040.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 165670471 is about 12871.3041685759. The cubic root of 165670471 is about 549.2225610924. Note that the first 3 decimals are identical.

It can be divided in two parts, 1656 and 70471, that added together give a palindrome (72127).

The spelling of 165670471 in words is "one hundred sixty-five million, six hundred seventy thousand, four hundred seventy-one".