66807478481 has 8 divisors (see below), whose sum is σ = 68965993728. Its totient is φ = 64649178000.

The previous prime is 66807478477. The next prime is 66807478589. The reversal of 66807478481 is 18487470866.

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 66807478481 - 2² = 66807478477 is a prime.

It is a super-2 number, since 2×66807478481² (a number of 22 digits) contains 22 as substring.

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 66807478481.

It is not an unprimeable number, because it can be changed into a prime (66807478421) 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 7 ways as a sum of consecutive naturals, for example, 788351 + ... + 868971.

It is an arithmetic number, because the mean of its divisors is an integer number (8620749216).

Almost surely, 2^66807478481 is an apocalyptic number.

It is an amenable number.

66807478481 is a deficient number, since it is larger than the sum of its proper divisors (2158515247).

66807478481 is a wasteful number, since it uses less digits than its factorization.

66807478481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107383.

The product of its (nonzero) digits is 14450688, while the sum is 59.

The spelling of 66807478481 in words is "sixty-six billion, eight hundred seven million, four hundred seventy-eight thousand, four hundred eighty-one".