669982 has 4 divisors (see below), whose sum is σ = 1004976. Its totient is φ = 334990.

The previous prime is 669971. The next prime is 669989. The reversal of 669982 is 289966.

It is a happy number.

669982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289966 = 2 ⋅144983.

It is a d-powerful number, because it can be written as 6² + 6⁶ + 9⁵ + 9⁶ + 8⁵ + 2⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669989) by changing a digit.

669982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167494 + ... + 167497.

It is an arithmetic number, because the mean of its divisors is an integer number (251244).

2⁶⁶⁹⁹⁸² is an apocalyptic number.

669982 is a deficient number, since it is larger than the sum of its proper divisors (334994).

669982 is a wasteful number, since it uses less digits than its factorization.

669982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334993.

The product of its digits is 46656, while the sum is 40.

The square root of 669982 is about 818.5242818634. The cubic root of 669982 is about 87.5026176088.

Subtracting from 669982 its product of digits (46656), we obtain a palindrome (623326).

The spelling of 669982 in words is "six hundred sixty-nine thousand, nine hundred eighty-two".