6466241261 has 4 divisors (see below), whose sum is σ = 6846608412. Its totient is φ = 6085874112.

The previous prime is 6466241251. The next prime is 6466241263. The reversal of 6466241261 is 1621426646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5240891236 + 1225350025 = 72394^2 + 35005^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466241261 - 2¹⁰ = 6466240237 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 (6466241263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190183550 + ... + 190183583.

It is an arithmetic number, because the mean of its divisors is an integer number (1711652103).

Almost surely, 2^6466241261 is an apocalyptic number.

It is an amenable number.

6466241261 is a deficient number, since it is larger than the sum of its proper divisors (380367151).

6466241261 is a wasteful number, since it uses less digits than its factorization.

6466241261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380367150.

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

The square root of 6466241261 is about 80412.9421237651. The cubic root of 6466241261 is about 1863.0190747321.

The spelling of 6466241261 in words is "six billion, four hundred sixty-six million, two hundred forty-one thousand, two hundred sixty-one".