4665423421 has 4 divisors (see below), whose sum is σ = 4753450332. Its totient is φ = 4577396512.

The previous prime is 4665423391. The next prime is 4665423437. The reversal of 4665423421 is 1243245664.

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 2086205625 + 2579217796 = 45675^2 + 50786^2 .

It is a cyclic number.

It is not a de Polignac number, because 4665423421 - 2¹¹ = 4665421373 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 (4665423481) 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, 44013376 + ... + 44013481.

It is an arithmetic number, because the mean of its divisors is an integer number (1188362583).

Almost surely, 2^4665423421 is an apocalyptic number.

It is an amenable number.

4665423421 is a deficient number, since it is larger than the sum of its proper divisors (88026911).

4665423421 is an equidigital number, since it uses as much as digits as its factorization.

4665423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88026910.

The product of its digits is 138240, while the sum is 37.

The square root of 4665423421 is about 68303.9048737332. The cubic root of 4665423421 is about 1670.9508994047.

The spelling of 4665423421 in words is "four billion, six hundred sixty-five million, four hundred twenty-three thousand, four hundred twenty-one".