2661814816 has 12 divisors (see below), whose sum is σ = 5240447982. Its totient is φ = 1330907392.

The previous prime is 2661814801. The next prime is 2661814819. The reversal of 2661814816 is 6184181662.

It can be written as a sum of positive squares in only one way, i.e., 2237290000 + 424524816 = 47300^2 + 20604^2 .

It is a super-2 number, since 2×2661814816² = 14170516229354227712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661814819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41590825 + ... + 41590888.

Almost surely, 2^2661814816 is an apocalyptic number.

It is an amenable number.

2661814816 is a deficient number, since it is larger than the sum of its proper divisors (2578633166).

2661814816 is an equidigital number, since it uses as much as digits as its factorization.

2661814816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83181723 (or 83181715 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 2661814816 is about 51592.7787195069. The cubic root of 2661814816 is about 1385.8810167810.

The spelling of 2661814816 in words is "two billion, six hundred sixty-one million, eight hundred fourteen thousand, eight hundred sixteen".