66655470745 has 8 divisors (see below), whose sum is σ = 80338929984. Its totient is φ = 53089466544.

The previous prime is 66655470709. The next prime is 66655470767. The reversal of 66655470745 is 54707455666.

It is a happy number.

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 66655470745 - 2²¹ = 66653373593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29362509 + ... + 29364778.

It is an arithmetic number, because the mean of its divisors is an integer number (10042366248).

Almost surely, 2^66655470745 is an apocalyptic number.

It is an amenable number.

66655470745 is a deficient number, since it is larger than the sum of its proper divisors (13683459239).

66655470745 is a wasteful number, since it uses less digits than its factorization.

66655470745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58727519.

The product of its (nonzero) digits is 21168000, while the sum is 55.

The spelling of 66655470745 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy thousand, seven hundred forty-five".