664030421 has 8 divisors (see below), whose sum is σ = 703344384. Its totient is φ = 624744640.

The previous prime is 664030403. The next prime is 664030483. The reversal of 664030421 is 124030466.

664030421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664030421 - 2⁶ = 664030357 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 (664030121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59516 + ... + 69786.

It is an arithmetic number, because the mean of its divisors is an integer number (87918048).

Almost surely, 2^664030421 is an apocalyptic number.

It is an amenable number.

664030421 is a deficient number, since it is larger than the sum of its proper divisors (39313963).

664030421 is a wasteful number, since it uses less digits than its factorization.

664030421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14091.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 664030421 is about 25768.7877285681. The cubic root of 664030421 is about 872.4274572353.

Adding to 664030421 its reverse (124030466), we get a palindrome (788060887).

The spelling of 664030421 in words is "six hundred sixty-four million, thirty thousand, four hundred twenty-one".