664280403 has 8 divisors (see below), whose sum is σ = 889075968. Its totient is φ = 441169224.

The previous prime is 664280399. The next prime is 664280459. The reversal of 664280403 is 304082466.

664280403 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 not a de Polignac number, because 664280403 - 2² = 664280399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664282403) 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, 420175 + ... + 421752.

It is an arithmetic number, because the mean of its divisors is an integer number (111134496).

Almost surely, 2^664280403 is an apocalyptic number.

664280403 is a deficient number, since it is larger than the sum of its proper divisors (224795565).

664280403 is a wasteful number, since it uses less digits than its factorization.

664280403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842193.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 664280403 is about 25773.6377525564. The cubic root of 664280403 is about 872.5369219986.

The spelling of 664280403 in words is "six hundred sixty-four million, two hundred eighty thousand, four hundred three".