5611666722839 has 4 divisors (see below), whose sum is σ = 5614889967960. Its totient is φ = 5608443477720.

The previous prime is 5611666722821. The next prime is 5611666722853. The reversal of 5611666722839 is 9382276661165.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5611666722839 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 (5611666722539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611619949 + ... + 1611623430.

It is an arithmetic number, because the mean of its divisors is an integer number (1403722491990).

Almost surely, 2^{5611666722839} is an apocalyptic number.

5611666722839 is a deficient number, since it is larger than the sum of its proper divisors (3223245121).

5611666722839 is a wasteful number, since it uses less digits than its factorization.

5611666722839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223245120.

The product of its digits is 39191040, while the sum is 62.

The spelling of 5611666722839 in words is "five trillion, six hundred eleven billion, six hundred sixty-six million, seven hundred twenty-two thousand, eight hundred thirty-nine".