2661791412 has 48 divisors (see below), whose sum is σ = 7111352192. Its totient is φ = 759093120.

The previous prime is 2661791393. The next prime is 2661791413. The reversal of 2661791412 is 2141971662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661791413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16158 + ... + 74730.

Almost surely, 2^2661791412 is an apocalyptic number.

It is an amenable number.

2661791412 is an abundant number, since it is smaller than the sum of its proper divisors (4449560780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661791412 is a wasteful number, since it uses less digits than its factorization.

2661791412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59128 (or 59126 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 2661791412 is about 51592.5519043205. The cubic root of 2661791412 is about 1385.8769549840.

The spelling of 2661791412 in words is "two billion, six hundred sixty-one million, seven hundred ninety-one thousand, four hundred twelve".