3427066421381 has 4 divisors (see below), whose sum is σ = 3428023438764. Its totient is φ = 3426109404000.

The previous prime is 3427066421371. The next prime is 3427066421393. The reversal of 3427066421381 is 1831246607243.

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 1882477297156 + 1544589124225 = 1372034^2 + 1242815^2 .

It is a cyclic number.

It is not a de Polignac number, because 3427066421381 - 2³⁸ = 3152188514437 is a prime.

It is a super-2 number, since 2×3427066421381² (a number of 26 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 (3427066421371) 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, 478503320 + ... + 478510481.

It is an arithmetic number, because the mean of its divisors is an integer number (857005859691).

Almost surely, 2^{3427066421381} is an apocalyptic number.

It is an amenable number.

3427066421381 is a deficient number, since it is larger than the sum of its proper divisors (957017383).

3427066421381 is an equidigital number, since it uses as much as digits as its factorization.

3427066421381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957017382.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 3427066421381 in words is "three trillion, four hundred twenty-seven billion, sixty-six million, four hundred twenty-one thousand, three hundred eighty-one".