66733337437 has 4 divisors (see below), whose sum is σ = 71866671100. Its totient is φ = 61600003776.

The previous prime is 66733337417. The next prime is 66733337449. The reversal of 66733337437 is 73473333766.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2711180761 + 64022156676 = 52069^2 + 253026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66733337437 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 (66733337417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2566666812 + ... + 2566666837.

It is an arithmetic number, because the mean of its divisors is an integer number (17966667775).

Almost surely, 2^66733337437 is an apocalyptic number.

It is an amenable number.

66733337437 is a deficient number, since it is larger than the sum of its proper divisors (5133333663).

66733337437 is a wasteful number, since it uses less digits than its factorization.

66733337437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133333662.

The product of its digits is 12002256, while the sum is 52.

The spelling of 66733337437 in words is "sixty-six billion, seven hundred thirty-three million, three hundred thirty-seven thousand, four hundred thirty-seven".