662564 has 12 divisors (see below), whose sum is σ = 1325184. Its totient is φ = 283944.

The previous prime is 662551. The next prime is 662567. The reversal of 662564 is 465266.

662564 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 662564.

It is not an unprimeable number, because it can be changed into a prime (662567) by changing a digit.

662564 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 11804 + ... + 11859.

It is an arithmetic number, because the mean of its divisors is an integer number (110432).

2⁶⁶²⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

662564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

662564 is a wasteful number, since it uses less digits than its factorization.

662564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23674 (or 23672 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 662564 is about 813.9803437430. The cubic root of 662564 is about 87.1784771391.

The spelling of 662564 in words is "six hundred sixty-two thousand, five hundred sixty-four".