67584380347421 has 32 divisors (see below), whose sum is σ = 79960992860160. Its totient is φ = 55891120469184.

The previous prime is 67584380347409. The next prime is 67584380347423. The reversal of 67584380347421 is 12474308348576.

It is a de Polignac number, because none of the positive numbers 2^k-67584380347421 is a prime.

It is a super-2 number, since 2×67584380347421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67584380347423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2034248216 + ... + 2034281438.

It is an arithmetic number, because the mean of its divisors is an integer number (2498781026880).

Almost surely, 2^{67584380347421} is an apocalyptic number.

It is an amenable number.

67584380347421 is a deficient number, since it is larger than the sum of its proper divisors (12376612512739).

67584380347421 is a wasteful number, since it uses less digits than its factorization.

67584380347421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40265.

The product of its (nonzero) digits is 108380160, while the sum is 62.

The spelling of 67584380347421 in words is "sixty-seven trillion, five hundred eighty-four billion, three hundred eighty million, three hundred forty-seven thousand, four hundred twenty-one".