66747089384 has 16 divisors (see below), whose sum is σ = 126064304100. Its totient is φ = 33129941632.

The previous prime is 66747089369. The next prime is 66747089401. The reversal of 66747089384 is 48398074766.

It can be written as a sum of positive squares in 2 ways, for example, as 66707525284 + 39564100 = 258278^2 + 6290^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30449219 + ... + 30451410.

Almost surely, 2^66747089384 is an apocalyptic number.

It is an amenable number.

66747089384 is a deficient number, since it is larger than the sum of its proper divisors (59317214716).

66747089384 is a wasteful number, since it uses less digits than its factorization.

66747089384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60900772 (or 60900768 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 62.

The spelling of 66747089384 in words is "sixty-six billion, seven hundred forty-seven million, eighty-nine thousand, three hundred eighty-four".