1665130216 has 32 divisors (see below), whose sum is σ = 3155328000. Its totient is φ = 823732416.

The previous prime is 1665130213. The next prime is 1665130223. The reversal of 1665130216 is 6120315661.

It is not an unprimeable number, because it can be changed into a prime (1665130213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156425 + ... + 1157863.

It is an arithmetic number, because the mean of its divisors is an integer number (98604000).

Almost surely, 2^1665130216 is an apocalyptic number.

It is an amenable number.

1665130216 is a deficient number, since it is larger than the sum of its proper divisors (1490197784).

1665130216 is a wasteful number, since it uses less digits than its factorization.

1665130216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2877 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1665130216 is about 40806.0071067974. The cubic root of 1665130216 is about 1185.2666567442.

Adding to 1665130216 its reverse (6120315661), we get a palindrome (7785445877).

The spelling of 1665130216 in words is "one billion, six hundred sixty-five million, one hundred thirty thousand, two hundred sixteen".