3996661965 has 16 divisors (see below), whose sum is σ = 6421420800. Its totient is φ = 2122632512.

The previous prime is 3996661927. The next prime is 3996662003. The reversal of 3996661965 is 5691666993.

It is an interprime number because it is at equal distance from previous prime (3996661927) and next prime (3996662003).

It is a cyclic number.

It is not a de Polignac number, because 3996661965 - 2⁶ = 3996661901 is a prime.

It is a super-2 number, since 2×3996661965² = 31946613724955322450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3996661899 and 3996661908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553830 + ... + 560999.

It is an arithmetic number, because the mean of its divisors is an integer number (401338800).

Almost surely, 2^3996661965 is an apocalyptic number.

It is an amenable number.

3996661965 is a deficient number, since it is larger than the sum of its proper divisors (2424758835).

3996661965 is a wasteful number, since it uses less digits than its factorization.

3996661965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115076.

The product of its digits is 14171760, while the sum is 60.

The square root of 3996661965 is about 63219.1582117320. The cubic root of 3996661965 is about 1586.9593623916.

The spelling of 3996661965 in words is "three billion, nine hundred ninety-six million, six hundred sixty-one thousand, nine hundred sixty-five".