66554293789 has 16 divisors (see below), whose sum is σ = 68661725760. Its totient is φ = 64463575680.

The previous prime is 66554293787. The next prime is 66554293801. The reversal of 66554293789 is 98739245566.

It is a cyclic number.

It is not a de Polignac number, because 66554293789 - 2¹ = 66554293787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66554293789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554293787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13494654 + ... + 13499584.

It is an arithmetic number, because the mean of its divisors is an integer number (4291357860).

Almost surely, 2^66554293789 is an apocalyptic number.

It is an amenable number.

66554293789 is a deficient number, since it is larger than the sum of its proper divisors (2107431971).

66554293789 is a wasteful number, since it uses less digits than its factorization.

66554293789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540.

The product of its digits is 97977600, while the sum is 64.

The spelling of 66554293789 in words is "sixty-six billion, five hundred fifty-four million, two hundred ninety-three thousand, seven hundred eighty-nine".