67045482721 has 4 divisors (see below), whose sum is σ = 76623408832. Its totient is φ = 57467556612.

The previous prime is 67045482709. The next prime is 67045482769. The reversal of 67045482721 is 12728454076.

67045482721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67045482721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67045483721) 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, 4788963045 + ... + 4788963058.

It is an arithmetic number, because the mean of its divisors is an integer number (19155852208).

Almost surely, 2^67045482721 is an apocalyptic number.

It is an amenable number.

67045482721 is a deficient number, since it is larger than the sum of its proper divisors (9577926111).

67045482721 is an equidigital number, since it uses as much as digits as its factorization.

67045482721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577926110.

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 67045482721 in words is "sixty-seven billion, forty-five million, four hundred eighty-two thousand, seven hundred twenty-one".