67052021667 has 4 divisors (see below), whose sum is σ = 89402695560. Its totient is φ = 44701347776.

The previous prime is 67052021627. The next prime is 67052021719. The reversal of 67052021667 is 76612025076.

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 67052021667 - 2²⁰ = 67050973091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67052021627) 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, 11175336942 + ... + 11175336947.

It is an arithmetic number, because the mean of its divisors is an integer number (22350673890).

Almost surely, 2^67052021667 is an apocalyptic number.

67052021667 is a deficient number, since it is larger than the sum of its proper divisors (22350673893).

67052021667 is a wasteful number, since it uses less digits than its factorization.

67052021667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22350673892.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 67052021667 in words is "sixty-seven billion, fifty-two million, twenty-one thousand, six hundred sixty-seven".