2661241646 has 16 divisors (see below), whose sum is σ = 4655234400. Its totient is φ = 1140531840.

The previous prime is 2661241633. The next prime is 2661241679. The reversal of 2661241646 is 6461421662.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1938995 + ... + 1940366.

It is an arithmetic number, because the mean of its divisors is an integer number (290952150).

Almost surely, 2^2661241646 is an apocalyptic number.

2661241646 is a deficient number, since it is larger than the sum of its proper divisors (1993992754).

2661241646 is an equidigital number, since it uses as much as digits as its factorization.

2661241646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879384 (or 3879370 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 2661241646 is about 51587.2236702073. The cubic root of 2661241646 is about 1385.7815354748.

The spelling of 2661241646 in words is "two billion, six hundred sixty-one million, two hundred forty-one thousand, six hundred forty-six".