3961663799 has 16 divisors (see below), whose sum is σ = 4433885280. Its totient is φ = 3517655040.

The previous prime is 3961663777. The next prime is 3961663801. The reversal of 3961663799 is 9973661693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3961663799 is a prime.

It is a super-2 number, since 2×3961663799² = 31389560112614224802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961663709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52397 + ... + 103289.

It is an arithmetic number, because the mean of its divisors is an integer number (277117830).

Almost surely, 2^3961663799 is an apocalyptic number.

3961663799 is a deficient number, since it is larger than the sum of its proper divisors (472221481).

3961663799 is a wasteful number, since it uses less digits than its factorization.

3961663799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51170.

The product of its digits is 9920232, while the sum is 59.

The square root of 3961663799 is about 62941.7492527813. The cubic root of 3961663799 is about 1582.3135203164.

The spelling of 3961663799 in words is "three billion, nine hundred sixty-one million, six hundred sixty-three thousand, seven hundred ninety-nine".