996868663381 has 4 divisors (see below), whose sum is σ = 997010291200. Its totient is φ = 996727035564.

The previous prime is 996868663379. The next prime is 996868663387. The reversal of 996868663381 is 183366868699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183366868699 = 7 ⋅26195266957.

It is a cyclic number.

It is not a de Polignac number, because 996868663381 - 2¹ = 996868663379 is a prime.

It is a super-2 number, since 2×996868663381² (a number of 25 digits) 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 (996868663387) 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, 70803351 + ... + 70817428.

It is an arithmetic number, because the mean of its divisors is an integer number (249252572800).

Almost surely, 2^996868663381 is an apocalyptic number.

It is an amenable number.

996868663381 is a deficient number, since it is larger than the sum of its proper divisors (141627819).

996868663381 is a wasteful number, since it uses less digits than its factorization.

996868663381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141627818.

The product of its digits is 483729408, while the sum is 73.

The spelling of 996868663381 in words is "nine hundred ninety-six billion, eight hundred sixty-eight million, six hundred sixty-three thousand, three hundred eighty-one".