664707 has 8 divisors (see below), whose sum is σ = 899776. Its totient is φ = 436392.

The previous prime is 664693. The next prime is 664711. The reversal of 664707 is 707466.

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

It is not a de Polignac number, because 664707 - 2⁴ = 664691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453 + ... + 1854.

It is an arithmetic number, because the mean of its divisors is an integer number (112472).

2⁶⁶⁴⁷⁰⁷ is an apocalyptic number.

664707 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

664707 is a deficient number, since it is larger than the sum of its proper divisors (235069).

664707 is a wasteful number, since it uses less digits than its factorization.

664707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 664707 is about 815.2956518957. The cubic root of 664707 is about 87.2723661404.

The spelling of 664707 in words is "six hundred sixty-four thousand, seven hundred seven".