646662 has 8 divisors (see below), whose sum is σ = 1293336. Its totient is φ = 215552.

The previous prime is 646643. The next prime is 646669. The reversal of 646662 is 266646.

646662 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

646662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646669) 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, 53883 + ... + 53894.

It is an arithmetic number, because the mean of its divisors is an integer number (161667).

2⁶⁴⁶⁶⁶² is an apocalyptic number.

646662 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.

646662 is a wasteful number, since it uses less digits than its factorization.

646662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107782.

The product of its digits is 10368, while the sum is 30.

The square root of 646662 is about 804.1529705224. The cubic root of 646662 is about 86.4753736126.

It can be divided in two parts, 6 and 46662, that multiplied together give a palindrome (279972).

The spelling of 646662 in words is "six hundred forty-six thousand, six hundred sixty-two".