664627 has 8 divisors (see below), whose sum is σ = 691200. Its totient is φ = 638664.

The previous prime is 664621. The next prime is 664633. The reversal of 664627 is 726466.

It is an interprime number because it is at equal distance from previous prime (664621) and next prime (664633).

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 664627 - 2³ = 664619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664621) 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, 3624 + ... + 3802.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2⁶⁶⁴⁶²⁷ is an apocalyptic number.

664627 is a deficient number, since it is larger than the sum of its proper divisors (26573).

664627 is a wasteful number, since it uses less digits than its factorization.

664627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 12096, while the sum is 31.

The square root of 664627 is about 815.2465884627. The cubic root of 664627 is about 87.2688648135.

It can be divided in two parts, 664 and 627, that multiplied together give a triangular number (416328 = T₉₁₂).

The spelling of 664627 in words is "six hundred sixty-four thousand, six hundred twenty-seven".