64667163647 has 8 divisors (see below), whose sum is σ = 67414127232. Its totient is φ = 61961508000.

The previous prime is 64667163641. The next prime is 64667163683. The reversal of 64667163647 is 74636176646.

It is a happy number.

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 64667163647 - 2²⁰ = 64666115071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64667163592 and 64667163601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64667163641) 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, 10323788 + ... + 10330049.

It is an arithmetic number, because the mean of its divisors is an integer number (8426765904).

Almost surely, 2^64667163647 is an apocalyptic number.

64667163647 is a deficient number, since it is larger than the sum of its proper divisors (2746963585).

64667163647 is a wasteful number, since it uses less digits than its factorization.

64667163647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20653969.

The product of its digits is 18289152, while the sum is 56.

The spelling of 64667163647 in words is "sixty-four billion, six hundred sixty-seven million, one hundred sixty-three thousand, six hundred forty-seven".