1664265212 has 12 divisors (see below), whose sum is σ = 2922830736. Its totient is φ = 829170720.

The previous prime is 1664265191. The next prime is 1664265221. The reversal of 1664265212 is 2125624661.

It is a congruent number.

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, 739208 + ... + 741455.

It is an arithmetic number, because the mean of its divisors is an integer number (243569228).

Almost surely, 2^1664265212 is an apocalyptic number.

It is an amenable number.

1664265212 is a deficient number, since it is larger than the sum of its proper divisors (1258565524).

1664265212 is a wasteful number, since it uses less digits than its factorization.

1664265212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480948 (or 1480946 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 1664265212 is about 40795.4067512508. The cubic root of 1664265212 is about 1185.0613799086.

Adding to 1664265212 its reverse (2125624661), we get a palindrome (3789889873).

The spelling of 1664265212 in words is "one billion, six hundred sixty-four million, two hundred sixty-five thousand, two hundred twelve".