669782 has 4 divisors (see below), whose sum is σ = 1004676. Its totient is φ = 334890.

The previous prime is 669763. The next prime is 669787. The reversal of 669782 is 287966.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167444 + ... + 167447.

It is an arithmetic number, because the mean of its divisors is an integer number (251169).

2⁶⁶⁹⁷⁸² is an apocalyptic number.

669782 is a deficient number, since it is larger than the sum of its proper divisors (334894).

669782 is a wasteful number, since it uses less digits than its factorization.

669782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334893.

The product of its digits is 36288, while the sum is 38.

The square root of 669782 is about 818.4021016591. The cubic root of 669782 is about 87.4939097802.

It can be divided in two parts, 66978 and 2, that multiplied together give a square (133956 = 366²).

The spelling of 669782 in words is "six hundred sixty-nine thousand, seven hundred eighty-two".