1665160216 has 8 divisors (see below), whose sum is σ = 3122175420. Its totient is φ = 832580104.

The previous prime is 1665160207. The next prime is 1665160219. The reversal of 1665160216 is 6120615661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665160219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104072506 + ... + 104072521.

Almost surely, 2^1665160216 is an apocalyptic number.

It is an amenable number.

1665160216 is a deficient number, since it is larger than the sum of its proper divisors (1457015204).

1665160216 is a wasteful number, since it uses less digits than its factorization.

1665160216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208145033 (or 208145029 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1665160216 is about 40806.3746980787. The cubic root of 1665160216 is about 1185.2737748634.

Adding to 1665160216 its reverse (6120615661), we get a palindrome (7785775877).

It can be divided in two parts, 16651 and 60216, that added together give a palindrome (76867).

The spelling of 1665160216 in words is "one billion, six hundred sixty-five million, one hundred sixty thousand, two hundred sixteen".