5665430640421 has 4 divisors (see below), whose sum is σ = 5733688840992. Its totient is φ = 5597172439852.

The previous prime is 5665430640413. The next prime is 5665430640481. The reversal of 5665430640421 is 1240460345665.

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 5665430640421 - 2³ = 5665430640413 is a prime.

It is a super-2 number, since 2×5665430640421² (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 (5665430640481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34129100161 + ... + 34129100326.

It is an arithmetic number, because the mean of its divisors is an integer number (1433422210248).

Almost surely, 2^{5665430640421} is an apocalyptic number.

It is an amenable number.

5665430640421 is a deficient number, since it is larger than the sum of its proper divisors (68258200571).

5665430640421 is an equidigital number, since it uses as much as digits as its factorization.

5665430640421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68258200570.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 5665430640421 in words is "five trillion, six hundred sixty-five billion, four hundred thirty million, six hundred forty thousand, four hundred twenty-one".