669394 has 8 divisors (see below), whose sum is σ = 1095408. Its totient is φ = 304260.

The previous prime is 669391. The next prime is 669401. The reversal of 669394 is 493966.

669394 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.

It is not an unprimeable number, because it can be changed into a prime (669391) 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, 15192 + ... + 15235.

It is an arithmetic number, because the mean of its divisors is an integer number (136926).

2⁶⁶⁹³⁹⁴ is an apocalyptic number.

669394 is a deficient number, since it is larger than the sum of its proper divisors (426014).

669394 is a wasteful number, since it uses less digits than its factorization.

669394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30440.

The product of its digits is 34992, while the sum is 37.

The square root of 669394 is about 818.1650200296. The cubic root of 669394 is about 87.4770116480.

The spelling of 669394 in words is "six hundred sixty-nine thousand, three hundred ninety-four".