66307606647 has 8 divisors (see below), whose sum is σ = 89529258240. Its totient is φ = 43645513080.

The previous prime is 66307606619. The next prime is 66307606661. The reversal of 66307606647 is 74660670366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66307606647 - 2⁶ = 66307606583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66307606647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66307606447) 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, 139889229 + ... + 139889702.

It is an arithmetic number, because the mean of its divisors is an integer number (11191157280).

Almost surely, 2^66307606647 is an apocalyptic number.

66307606647 is a deficient number, since it is larger than the sum of its proper divisors (23221651593).

66307606647 is a wasteful number, since it uses less digits than its factorization.

66307606647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279779013.

The product of its (nonzero) digits is 4572288, while the sum is 51.

The spelling of 66307606647 in words is "sixty-six billion, three hundred seven million, six hundred six thousand, six hundred forty-seven".