3956395665 has 8 divisors (see below), whose sum is σ = 6330233088. Its totient is φ = 2110077680.

The previous prime is 3956395661. The next prime is 3956395679. The reversal of 3956395665 is 5665936593.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3956395665 - 2² = 3956395661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3956395661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131879841 + ... + 131879870.

It is an arithmetic number, because the mean of its divisors is an integer number (791279136).

Almost surely, 2^3956395665 is an apocalyptic number.

It is an amenable number.

3956395665 is a deficient number, since it is larger than the sum of its proper divisors (2373837423).

3956395665 is a wasteful number, since it uses less digits than its factorization.

3956395665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263759719.

The product of its digits is 19683000, while the sum is 57.

The square root of 3956395665 is about 62899.8860491814. The cubic root of 3956395665 is about 1581.6118338744.

The spelling of 3956395665 in words is "three billion, nine hundred fifty-six million, three hundred ninety-five thousand, six hundred sixty-five".