66744869339 has 4 divisors (see below), whose sum is σ = 66985825824. Its totient is φ = 66503912856.

The previous prime is 66744869329. The next prime is 66744869441. The reversal of 66744869339 is 93396844766.

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

It is not a de Polignac number, because 66744869339 - 2³² = 62449902043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66744869329) 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, 120477827 + ... + 120478380.

It is an arithmetic number, because the mean of its divisors is an integer number (16746456456).

Almost surely, 2^66744869339 is an apocalyptic number.

66744869339 is a deficient number, since it is larger than the sum of its proper divisors (240956485).

66744869339 is a wasteful number, since it uses less digits than its factorization.

66744869339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240956484.

The product of its digits is 141087744, while the sum is 65.

The spelling of 66744869339 in words is "sixty-six billion, seven hundred forty-four million, eight hundred sixty-nine thousand, three hundred thirty-nine".