3961663726 has 8 divisors (see below), whose sum is σ = 6147409320. Its totient is φ = 1912527288.

The previous prime is 3961663711. The next prime is 3961663729. The reversal of 3961663726 is 6273661693.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3961663726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961663729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34152216 + ... + 34152331.

It is an arithmetic number, because the mean of its divisors is an integer number (768426165).

Almost surely, 2^3961663726 is an apocalyptic number.

3961663726 is a deficient number, since it is larger than the sum of its proper divisors (2185745594).

3961663726 is a wasteful number, since it uses less digits than its factorization.

3961663726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68304578.

The product of its digits is 1469664, while the sum is 49.

The square root of 3961663726 is about 62941.7486728801. The cubic root of 3961663726 is about 1582.3135105975.

The spelling of 3961663726 in words is "three billion, nine hundred sixty-one million, six hundred sixty-three thousand, seven hundred twenty-six".