67972668563 has 4 divisors (see below), whose sum is σ = 68632597488. Its totient is φ = 67312739640.

The previous prime is 67972668557. The next prime is 67972668581. The reversal of 67972668563 is 36586627976.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67972668563 - 2⁸ = 67972668307 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 67972668563.

It is not an unprimeable number, because it can be changed into a prime (67972668523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329964308 + ... + 329964513.

It is an arithmetic number, because the mean of its divisors is an integer number (17158149372).

Almost surely, 2^67972668563 is an apocalyptic number.

67972668563 is a deficient number, since it is larger than the sum of its proper divisors (659928925).

67972668563 is a wasteful number, since it uses less digits than its factorization.

67972668563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659928924.

The product of its digits is 137168640, while the sum is 65.

The spelling of 67972668563 in words is "sixty-seven billion, nine hundred seventy-two million, six hundred sixty-eight thousand, five hundred sixty-three".