2661433421 has 16 divisors (see below), whose sum is σ = 2881628160. Its totient is φ = 2452602240.

The previous prime is 2661433399. The next prime is 2661433427. The reversal of 2661433421 is 1243341662.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661433421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661433427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29225 + ... + 78593.

It is an arithmetic number, because the mean of its divisors is an integer number (180101760).

Almost surely, 2^2661433421 is an apocalyptic number.

It is an amenable number.

2661433421 is a deficient number, since it is larger than the sum of its proper divisors (220194739).

2661433421 is a wasteful number, since it uses less digits than its factorization.

2661433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49484.

The product of its digits is 20736, while the sum is 32.

The square root of 2661433421 is about 51589.0823818373. The cubic root of 2661433421 is about 1385.8148221765.

The spelling of 2661433421 in words is "two billion, six hundred sixty-one million, four hundred thirty-three thousand, four hundred twenty-one".