648766 has 8 divisors (see below), whose sum is σ = 978120. Its totient is φ = 322728.

The previous prime is 648763. The next prime is 648779. The reversal of 648766 is 667846.

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 (648763) 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, 261 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (122265).

2⁶⁴⁸⁷⁶⁶ is an apocalyptic number.

648766 is a deficient number, since it is larger than the sum of its proper divisors (329354).

648766 is a wasteful number, since it uses less digits than its factorization.

648766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658.

The product of its digits is 48384, while the sum is 37.

The square root of 648766 is about 805.4601169518. The cubic root of 648766 is about 86.5690584204.

The spelling of 648766 in words is "six hundred forty-eight thousand, seven hundred sixty-six".