162665140 has 36 divisors (see below), whose sum is σ = 375479748. Its totient is φ = 59150080.

The previous prime is 162665123. The next prime is 162665141. The reversal of 162665140 is 41566261.

It can be written as a sum of positive squares in 2 ways, for example, as 107371044 + 55294096 = 10362^2 + 7436^2 .

It is a super-3 number, since 3×162665140³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162665141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31189 + ... + 36028.

It is an arithmetic number, because the mean of its divisors is an integer number (10429993).

Almost surely, 2^162665140 is an apocalyptic number.

162665140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

162665140 is an abundant number, since it is smaller than the sum of its proper divisors (212814608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

162665140 is a wasteful number, since it uses less digits than its factorization.

162665140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67248 (or 67235 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 162665140 is about 12754.0244628901. The cubic root of 162665140 is about 545.8812329168.

It can be divided in two parts, 1626 and 65140, that added together give a palindrome (66766).

The spelling of 162665140 in words is "one hundred sixty-two million, six hundred sixty-five thousand, one hundred forty".