664714 has 8 divisors (see below), whose sum is σ = 1003680. Its totient is φ = 330156.

The previous prime is 664711. The next prime is 664739. The reversal of 664714 is 417466.

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

It is not an unprimeable number, because it can be changed into a prime (664711) 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 3 ways as a sum of consecutive naturals, for example, 694 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (125460).

2⁶⁶⁴⁷¹⁴ is an apocalyptic number.

664714 is a deficient number, since it is larger than the sum of its proper divisors (338966).

664714 is a wasteful number, since it uses less digits than its factorization.

664714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204.

The product of its digits is 4032, while the sum is 28.

The square root of 664714 is about 815.2999448056. The cubic root of 664714 is about 87.2726724931.

Adding to 664714 its product of digits (4032), we get a triangular number (668746 = T₁₁₅₆).

It can be divided in two parts, 664 and 714, that added together give a triangular number (1378 = T₅₂).

The spelling of 664714 in words is "six hundred sixty-four thousand, seven hundred fourteen".