664430255 has 8 divisors (see below), whose sum is σ = 798374112. Its totient is φ = 530839008.

The previous prime is 664430243. The next prime is 664430287. The reversal of 664430255 is 552034466.

It is a happy number.

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 664430255 - 2⁶ = 664430191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83987 + ... + 91556.

It is an arithmetic number, because the mean of its divisors is an integer number (99796764).

Almost surely, 2^664430255 is an apocalyptic number.

664430255 is a deficient number, since it is larger than the sum of its proper divisors (133943857).

664430255 is a wasteful number, since it uses less digits than its factorization.

664430255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176305.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 664430255 is about 25776.5446675849. The cubic root of 664430255 is about 872.6025276132.

The spelling of 664430255 in words is "six hundred sixty-four million, four hundred thirty thousand, two hundred fifty-five".