664361 has 8 divisors (see below), whose sum is σ = 710400. Its totient is φ = 619920.

The previous prime is 664357. The next prime is 664369. The reversal of 664361 is 163466.

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 664361 - 2² = 664357 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 664361.

It is not an unprimeable number, because it can be changed into a prime (664369) 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, 530 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (88800).

2⁶⁶⁴³⁶¹ is an apocalyptic number.

It is an amenable number.

664361 is a deficient number, since it is larger than the sum of its proper divisors (46039).

664361 is a wasteful number, since it uses less digits than its factorization.

664361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799.

The product of its digits is 2592, while the sum is 26.

The square root of 664361 is about 815.0834313124. The cubic root of 664361 is about 87.2572208811.

The spelling of 664361 in words is "six hundred sixty-four thousand, three hundred sixty-one".