3165665540 has 72 divisors (see below), whose sum is σ = 7081126920. Its totient is φ = 1188548608.

The previous prime is 3165665537. The next prime is 3165665599. The reversal of 3165665540 is 455665613.

It can be written as a sum of positive squares in 12 ways, for example, as 484704256 + 2680961284 = 22016^2 + 51778^2 .

It is a super-2 number, since 2×3165665540² = 20042876622286983200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3912656 + ... + 3913464.

It is an arithmetic number, because the mean of its divisors is an integer number (98348985).

Almost surely, 2^3165665540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3165665540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3540563460).

3165665540 is an abundant number, since it is smaller than the sum of its proper divisors (3915461380).

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

3165665540 is a wasteful number, since it uses less digits than its factorization.

3165665540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 3165665540 is about 56264.2474400929. The cubic root of 3165665540 is about 1468.3232520510.

The spelling of 3165665540 in words is "three billion, one hundred sixty-five million, six hundred sixty-five thousand, five hundred forty".