7065943968421 has 4 divisors (see below), whose sum is σ = 7609478119852. Its totient is φ = 6522409816992.

The previous prime is 7065943968379. The next prime is 7065943968511. The reversal of 7065943968421 is 1248693495607.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 948508479396 + 6117435489025 = 973914^2 + 2473345^2 .

It is a cyclic number.

It is not a de Polignac number, because 7065943968421 - 2³⁹ = 6516188154533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7065943968821) 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, 271767075696 + ... + 271767075721.

It is an arithmetic number, because the mean of its divisors is an integer number (1902369529963).

It is a 1-persistent number, because it is pandigital, but 2⋅7065943968421 = 14131887936842 is not.

Almost surely, 2^{7065943968421} is an apocalyptic number.

It is an amenable number.

7065943968421 is a deficient number, since it is larger than the sum of its proper divisors (543534151431).

7065943968421 is a wasteful number, since it uses less digits than its factorization.

7065943968421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543534151430.

The product of its (nonzero) digits is 78382080, while the sum is 64.

The spelling of 7065943968421 in words is "seven trillion, sixty-five billion, nine hundred forty-three million, nine hundred sixty-eight thousand, four hundred twenty-one".