66738940335 has 32 divisors (see below), whose sum is σ = 120111802560. Its totient is φ = 35594095680.

The previous prime is 66738940313. The next prime is 66738940339. The reversal of 66738940335 is 53304983766.

66738940335 is a `hidden beast` number, since 66 + 73 + 89 + 403 + 35 = 666.

It is not a de Polignac number, because 66738940335 - 2¹² = 66738936239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66738940339) 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 31 ways as a sum of consecutive naturals, for example, 3040686 + ... + 3062555.

It is an arithmetic number, because the mean of its divisors is an integer number (3753493830).

Almost surely, 2^66738940335 is an apocalyptic number.

66738940335 is a deficient number, since it is larger than the sum of its proper divisors (53372862225).

66738940335 is an frugal number, since it uses more digits than its factorization.

66738940335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103267 (or 6103249 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 66738940335 in words is "sixty-six billion, seven hundred thirty-eight million, nine hundred forty thousand, three hundred thirty-five".