1665160220 has 12 divisors (see below), whose sum is σ = 3496836504. Its totient is φ = 666064080.

The previous prime is 1665160219. The next prime is 1665160223. The reversal of 1665160220 is 220615661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665160223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41628986 + ... + 41629025.

It is an arithmetic number, because the mean of its divisors is an integer number (291403042).

Almost surely, 2^1665160220 is an apocalyptic number.

1665160220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665160220 is an abundant number, since it is smaller than the sum of its proper divisors (1831676284).

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

1665160220 is a wasteful number, since it uses less digits than its factorization.

1665160220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83258020 (or 83258018 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1665160220 is about 40806.3747470907. The cubic root of 1665160220 is about 1185.2737758125.

Adding to 1665160220 its reverse (220615661), we get a palindrome (1885775881).

The spelling of 1665160220 in words is "one billion, six hundred sixty-five million, one hundred sixty thousand, two hundred twenty".