3968957799667 has 4 divisors (see below), whose sum is σ = 4535951771056. Its totient is φ = 3401963828280.

The previous prime is 3968957799647. The next prime is 3968957799733. The reversal of 3968957799667 is 7669977598693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3968957799667 - 2³⁵ = 3934598061299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3968957799617) 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, 283496985684 + ... + 283496985697.

It is an arithmetic number, because the mean of its divisors is an integer number (1133987942764).

Almost surely, 2^{3968957799667} is an apocalyptic number.

3968957799667 is a deficient number, since it is larger than the sum of its proper divisors (566993971389).

3968957799667 is an equidigital number, since it uses as much as digits as its factorization.

3968957799667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566993971388.

The product of its digits is 58330964160, while the sum is 91.

The spelling of 3968957799667 in words is "three trillion, nine hundred sixty-eight billion, nine hundred fifty-seven million, seven hundred ninety-nine thousand, six hundred sixty-seven".