67312553576721 has 8 divisors (see below), whose sum is σ = 89783673120384. Its totient is φ = 44858234875440.

The previous prime is 67312553576687. The next prime is 67312553576731. The reversal of 67312553576721 is 12767535521376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67312553576721 - 2³⁷ = 67175114623249 is a prime.

It is a super-2 number, since 2×67312553576721² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67312553576731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4200201246 + ... + 4200217271.

It is an arithmetic number, because the mean of its divisors is an integer number (11222959140048).

Almost surely, 2^{67312553576721} is an apocalyptic number.

It is an amenable number.

67312553576721 is a deficient number, since it is larger than the sum of its proper divisors (22471119543663).

67312553576721 is a wasteful number, since it uses less digits than its factorization.

67312553576721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400421191.

The product of its digits is 55566000, while the sum is 60.

The spelling of 67312553576721 in words is "sixty-seven trillion, three hundred twelve billion, five hundred fifty-three million, five hundred seventy-six thousand, seven hundred twenty-one".