165667240 has 16 divisors (see below), whose sum is σ = 372751380. Its totient is φ = 66266880.

The previous prime is 165667219. The next prime is 165667267. The reversal of 165667240 is 42766561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 165431044 + 236196 = 12862^2 + 486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165667240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070801 + ... + 2070880.

Almost surely, 2^165667240 is an apocalyptic number.

165667240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165667240 is an abundant number, since it is smaller than the sum of its proper divisors (207084140).

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

165667240 is a wasteful number, since it uses less digits than its factorization.

165667240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141692 (or 4141688 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 165667240 is about 12871.1786562071. The cubic root of 165667240 is about 549.2189906520.

The spelling of 165667240 in words is "one hundred sixty-five million, six hundred sixty-seven thousand, two hundred forty".