66357566747 has 8 divisors (see below), whose sum is σ = 69948603600. Its totient is φ = 62776383264.

The previous prime is 66357566719. The next prime is 66357566749. The reversal of 66357566747 is 74766575366.

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 66357566747 - 2⁶ = 66357566683 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 66357566747.

It is not an unprimeable number, because it can be changed into a prime (66357566749) 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, 2449508 + ... + 2476449.

It is an arithmetic number, because the mean of its divisors is an integer number (8743575450).

Almost surely, 2^66357566747 is an apocalyptic number.

66357566747 is a deficient number, since it is larger than the sum of its proper divisors (3591036853).

66357566747 is a wasteful number, since it uses less digits than its factorization.

66357566747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926685.

The product of its digits is 133358400, while the sum is 62.

The spelling of 66357566747 in words is "sixty-six billion, three hundred fifty-seven million, five hundred sixty-six thousand, seven hundred forty-seven".