660165353 has 4 divisors (see below), whose sum is σ = 669208788. Its totient is φ = 651121920.

The previous prime is 660165347. The next prime is 660165371. The reversal of 660165353 is 353561066.

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

It can be written as a sum of positive squares in 2 ways, for example, as 449567209 + 210598144 = 21203^2 + 14512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660165353 is a prime.

It is a super-2 number, since 2×660165353² = 871636586603229218, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660161353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4521608 + ... + 4521753.

It is an arithmetic number, because the mean of its divisors is an integer number (167302197).

Almost surely, 2^660165353 is an apocalyptic number.

It is an amenable number.

660165353 is a deficient number, since it is larger than the sum of its proper divisors (9043435).

660165353 is an equidigital number, since it uses as much as digits as its factorization.

660165353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043434.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 660165353 is about 25693.6831341869. The cubic root of 660165353 is about 870.7314731670.

The spelling of 660165353 in words is "six hundred sixty million, one hundred sixty-five thousand, three hundred fifty-three".