67620506742409 has 4 divisors (see below), whose sum is σ = 67626639020304. Its totient is φ = 67614374464516.

The previous prime is 67620506742391. The next prime is 67620506742419. The reversal of 67620506742409 is 90424760502676.

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 67620506742409 - 2⁴⁵ = 32436134653577 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67620506742419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066122407 + ... + 3066144460.

It is an arithmetic number, because the mean of its divisors is an integer number (16906659755076).

Almost surely, 2^{67620506742409} is an apocalyptic number.

It is an amenable number.

67620506742409 is a deficient number, since it is larger than the sum of its proper divisors (6132277895).

67620506742409 is a wasteful number, since it uses less digits than its factorization.

67620506742409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132277894.

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 67620506742409 in words is "sixty-seven trillion, six hundred twenty billion, five hundred six million, seven hundred forty-two thousand, four hundred nine".