66939029079 has 16 divisors (see below), whose sum is σ = 96136892544. Its totient is φ = 41184972000.

The previous prime is 66939029071. The next prime is 66939029081. The reversal of 66939029079 is 97092093966.

It is not a de Polignac number, because 66939029079 - 2³ = 66939029071 is a prime.

It is a super-2 number, since 2×66939029079² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66939029071) 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 15 ways as a sum of consecutive naturals, for example, 27084 + ... + 366894.

It is an arithmetic number, because the mean of its divisors is an integer number (6008555784).

Almost surely, 2^66939029079 is an apocalyptic number.

66939029079 is a deficient number, since it is larger than the sum of its proper divisors (29197863465).

66939029079 is a wasteful number, since it uses less digits than its factorization.

66939029079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344878.

The product of its (nonzero) digits is 9920232, while the sum is 60.

The spelling of 66939029079 in words is "sixty-six billion, nine hundred thirty-nine million, twenty-nine thousand, seventy-nine".