3965665693 has 32 divisors (see below), whose sum is σ = 4716662400. Its totient is φ = 3295468800.

The previous prime is 3965665663. The next prime is 3965665729.

3965665693 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3965665693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965665603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672763 + ... + 678631.

It is an arithmetic number, because the mean of its divisors is an integer number (147395700).

Almost surely, 2^3965665693 is an apocalyptic number.

It is an amenable number.

3965665693 is a deficient number, since it is larger than the sum of its proper divisors (750996707).

3965665693 is a wasteful number, since it uses less digits than its factorization.

3965665693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013.

The product of its digits is 23619600, while the sum is 58.

The square root of 3965665693 is about 62973.5316859393. The cubic root of 3965665693 is about 1582.8461349211.

The spelling of 3965665693 in words is "three billion, nine hundred sixty-five million, six hundred sixty-five thousand, six hundred ninety-three".