648566 has 8 divisors (see below), whose sum is σ = 976320. Its totient is φ = 323128.

The previous prime is 648563. The next prime is 648607. The reversal of 648566 is 665846.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (122040).

2⁶⁴⁸⁵⁶⁶ is an apocalyptic number.

648566 is a deficient number, since it is larger than the sum of its proper divisors (327754).

648566 is a wasteful number, since it uses less digits than its factorization.

648566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its digits is 34560, while the sum is 35.

The square root of 648566 is about 805.3359547419. The cubic root of 648566 is about 86.5601617401.

The spelling of 648566 in words is "six hundred forty-eight thousand, five hundred sixty-six".