664799403 has 8 divisors (see below), whose sum is σ = 889196688. Its totient is φ = 441800864.

The previous prime is 664799347. The next prime is 664799413. The reversal of 664799403 is 304997466.

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 664799403 - 2⁹ = 664798891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664799413) 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, 348576 + ... + 350477.

It is an arithmetic number, because the mean of its divisors is an integer number (111149586).

Almost surely, 2^664799403 is an apocalyptic number.

664799403 is a deficient number, since it is larger than the sum of its proper divisors (224397285).

664799403 is a wasteful number, since it uses less digits than its factorization.

664799403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699373.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 664799403 is about 25783.7042140962. The cubic root of 664799403 is about 872.7640995458.

The spelling of 664799403 in words is "six hundred sixty-four million, seven hundred ninety-nine thousand, four hundred three".