67367673721 has 4 divisors (see below), whose sum is σ = 67368854272. Its totient is φ = 67366493172.

The previous prime is 67367673707. The next prime is 67367673731. The reversal of 67367673721 is 12737676376.

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 not a de Polignac number, because 67367673721 - 2²⁹ = 66830802809 is a prime.

It is a super-2 number, since 2×67367673721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67367673731) 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, 500085 + ... + 620338.

It is an arithmetic number, because the mean of its divisors is an integer number (16842213568).

Almost surely, 2^67367673721 is an apocalyptic number.

It is an amenable number.

67367673721 is a deficient number, since it is larger than the sum of its proper divisors (1180551).

67367673721 is a wasteful number, since it uses less digits than its factorization.

67367673721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180550.

The product of its digits is 9335088, while the sum is 55.

The spelling of 67367673721 in words is "sixty-seven billion, three hundred sixty-seven million, six hundred seventy-three thousand, seven hundred twenty-one".