2661212812 has 6 divisors (see below), whose sum is σ = 4657122428. Its totient is φ = 1330606404.

The previous prime is 2661212783. The next prime is 2661212819. The reversal of 2661212812 is 2182121662.

It is not an unprimeable number, because it can be changed into a prime (2661212819) 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 as a sum of consecutive naturals, namely, 332651598 + ... + 332651605.

Almost surely, 2^2661212812 is an apocalyptic number.

It is an amenable number.

2661212812 is a deficient number, since it is larger than the sum of its proper divisors (1995909616).

2661212812 is a wasteful number, since it uses less digits than its factorization.

2661212812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665303207 (or 665303205 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 2661212812 is about 51586.9442010282. The cubic root of 2661212812 is about 1385.7765305717.

The spelling of 2661212812 in words is "two billion, six hundred sixty-one million, two hundred twelve thousand, eight hundred twelve".