66745408044779 has 8 divisors (see below), whose sum is σ = 67044130692000. Its totient is φ = 66446748510912.

The previous prime is 66745408044773. The next prime is 66745408044781. The reversal of 66745408044779 is 97744080454766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66745408044779 - 2²⁴ = 66745391267563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66745408044773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13657874 + ... + 17889335.

It is an arithmetic number, because the mean of its divisors is an integer number (8380516336500).

Almost surely, 2^{66745408044779} is an apocalyptic number.

66745408044779 is a deficient number, since it is larger than the sum of its proper divisors (298722647221).

66745408044779 is a wasteful number, since it uses less digits than its factorization.

66745408044779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31556677.

The product of its (nonzero) digits is 1137991680, while the sum is 71.

The spelling of 66745408044779 in words is "sixty-six trillion, seven hundred forty-five billion, four hundred eight million, forty-four thousand, seven hundred seventy-nine".