5338666661 has 4 divisors (see below), whose sum is σ = 5406244800. Its totient is φ = 5271088524.

The previous prime is 5338666657. The next prime is 5338666673. The reversal of 5338666661 is 1666668335.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5338666661 - 2² = 5338666657 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 (5338666651) 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, 33788951 + ... + 33789108.

It is an arithmetic number, because the mean of its divisors is an integer number (1351561200).

Almost surely, 2^5338666661 is an apocalyptic number.

It is an amenable number.

5338666661 is a deficient number, since it is larger than the sum of its proper divisors (67578139).

5338666661 is an equidigital number, since it uses as much as digits as its factorization.

5338666661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67578138.

The product of its digits is 2799360, while the sum is 50.

The square root of 5338666661 is about 73066.1800082637. The cubic root of 5338666661 is about 1747.7431218095.

The spelling of 5338666661 in words is "five billion, three hundred thirty-eight million, six hundred sixty-six thousand, six hundred sixty-one".