66910570384 has 20 divisors (see below), whose sum is σ = 148159120384. Its totient is φ = 28675958688.

The previous prime is 66910570381. The next prime is 66910570387. The reversal of 66910570384 is 48307501966.

It is an interprime number because it is at equal distance from previous prime (66910570381) and next prime (66910570387).

It is a super-2 number, since 2×66910570384² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66910570381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298707792 + ... + 298708015.

Almost surely, 2^66910570384 is an apocalyptic number.

It is an amenable number.

66910570384 is an abundant number, since it is smaller than the sum of its proper divisors (81248550000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66910570384 is a wasteful number, since it uses less digits than its factorization.

66910570384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597415822 (or 597415816 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 66910570384 in words is "sixty-six billion, nine hundred ten million, five hundred seventy thousand, three hundred eighty-four".