2996787781 has 8 divisors (see below), whose sum is σ = 3258644480. Its totient is φ = 2739407472.

The previous prime is 2996787769. The next prime is 2996787803. The reversal of 2996787781 is 1877876992.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2996787781 - 2⁷ = 2996787653 is a prime.

It is a super-2 number, since 2×2996787781² = 17961474008701807922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2996787721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1117701 + ... + 1120378.

It is an arithmetic number, because the mean of its divisors is an integer number (407330560).

Almost surely, 2^2996787781 is an apocalyptic number.

It is an amenable number.

2996787781 is a deficient number, since it is larger than the sum of its proper divisors (261856699).

2996787781 is a wasteful number, since it uses less digits than its factorization.

2996787781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238195.

The product of its digits is 21337344, while the sum is 64.

The square root of 2996787781 is about 54742.9244834435. The cubic root of 2996787781 is about 1441.7346285327.

The spelling of 2996787781 in words is "two billion, nine hundred ninety-six million, seven hundred eighty-seven thousand, seven hundred eighty-one".