2661940836 has 27 divisors (see below), whose sum is σ = 6729577491. Its totient is φ = 887210424.

The previous prime is 2661940823. The next prime is 2661940849. The reversal of 2661940836 is 6380491662.

The square root of 2661940836 is 51594.

It is a perfect power (a square), and thus also a powerful number.

2661940836 is a `hidden beast` number, since 26 + 619 + 4 + 0 + 8 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (2661940823) and next prime (2661940849).

It is a junction number, because it is equal to n+sod(n) for n = 2661940791 and 2661940800.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 305265 + ... + 313863.

Almost surely, 2^2661940836 is an apocalyptic number.

2661940836 is the 51594-th square number.

It is an amenable number.

2661940836 is an abundant number, since it is smaller than the sum of its proper divisors (4067636655).

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

2661940836 is an frugal number, since it uses more digits than its factorization.

2661940836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17208 (or 8604 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The cubic root of 2661940836 is about 1385.9028873195.

The spelling of 2661940836 in words is "two billion, six hundred sixty-one million, nine hundred forty thousand, eight hundred thirty-six".