1664965116 has 36 divisors (see below), whose sum is σ = 4212298272. Its totient is φ = 554508864.

The previous prime is 1664965111. The next prime is 1664965151. The reversal of 1664965116 is 6115694661.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664965111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23565 + ... + 62331.

Almost surely, 2^1664965116 is an apocalyptic number.

It is an amenable number.

1664965116 is an abundant number, since it is smaller than the sum of its proper divisors (2547333156).

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

1664965116 is a wasteful number, since it uses less digits than its factorization.

1664965116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39970 (or 39965 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1664965116 is about 40803.9840701861. The cubic root of 1664965116 is about 1185.2274818314.

The spelling of 1664965116 in words is "one billion, six hundred sixty-four million, nine hundred sixty-five thousand, one hundred sixteen".