82721241067 has 4 divisors (see below), whose sum is σ = 82727215120. Its totient is φ = 82715267016.

The previous prime is 82721241037. The next prime is 82721241079. The reversal of 82721241067 is 76014212728.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82721241067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82721241037) 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, 2966208 + ... + 2993965.

It is an arithmetic number, because the mean of its divisors is an integer number (20681803780).

Almost surely, 2^82721241067 is an apocalyptic number.

82721241067 is a deficient number, since it is larger than the sum of its proper divisors (5974053).

82721241067 is a wasteful number, since it uses less digits than its factorization.

82721241067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974052.

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 82721241067 in words is "eighty-two billion, seven hundred twenty-one million, two hundred forty-one thousand, sixty-seven".