5021712666 has 64 divisors (see below), whose sum is σ = 11394518400. Its totient is φ = 1638862848.

The previous prime is 5021712649. The next prime is 5021712701. The reversal of 5021712666 is 6662171205.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 5021712666.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 815736 + ... + 821868.

It is an arithmetic number, because the mean of its divisors is an integer number (178039350).

Almost surely, 2^5021712666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5021712666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5697259200).

5021712666 is an abundant number, since it is smaller than the sum of its proper divisors (6372805734).

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

5021712666 is a wasteful number, since it uses less digits than its factorization.

5021712666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460 (or 6454 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 5021712666 is about 70864.0435340801. The cubic root of 5021712666 is about 1712.4475815095.

The spelling of 5021712666 in words is "five billion, twenty-one million, seven hundred twelve thousand, six hundred sixty-six".