66339157249 has 4 divisors (see below), whose sum is σ = 66339716436. Its totient is φ = 66338598064.

The previous prime is 66339157237. The next prime is 66339157253. The reversal of 66339157249 is 94275193366.

66339157249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 30317774400 + 36021382849 = 174120^2 + 189793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66339157249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66339157249.

It is not an unprimeable number, because it can be changed into a prime (66339157219) 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, 23374 + ... + 364999.

It is an arithmetic number, because the mean of its divisors is an integer number (16584929109).

Almost surely, 2^66339157249 is an apocalyptic number.

It is an amenable number.

66339157249 is a deficient number, since it is larger than the sum of its proper divisors (559187).

66339157249 is a wasteful number, since it uses less digits than its factorization.

66339157249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559186.

The product of its digits is 7348320, while the sum is 55.

The spelling of 66339157249 in words is "sixty-six billion, three hundred thirty-nine million, one hundred fifty-seven thousand, two hundred forty-nine".