5261631866 has 8 divisors (see below), whose sum is σ = 7910427360. Its totient is φ = 2624822748.

The previous prime is 5261631857. The next prime is 5261631883. The reversal of 5261631866 is 6681361625.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2995496 + ... + 2997251.

It is an arithmetic number, because the mean of its divisors is an integer number (988803420).

Almost surely, 2^5261631866 is an apocalyptic number.

5261631866 is a deficient number, since it is larger than the sum of its proper divisors (2648795494).

5261631866 is a wasteful number, since it uses less digits than its factorization.

5261631866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993188.

The product of its digits is 311040, while the sum is 44.

The square root of 5261631866 is about 72537.1068212677. The cubic root of 5261631866 is about 1739.2959526672.

The spelling of 5261631866 in words is "five billion, two hundred sixty-one million, six hundred thirty-one thousand, eight hundred sixty-six".