669464 has 16 divisors (see below), whose sum is σ = 1275000. Its totient is φ = 329472.

The previous prime is 669463. The next prime is 669479. The reversal of 669464 is 464966.

669464 = 197² + 198² + ... + 212².

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669463) 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, 89 + ... + 1160.

2⁶⁶⁹⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

669464 is a deficient number, since it is larger than the sum of its proper divisors (605536).

669464 is a wasteful number, since it uses less digits than its factorization.

669464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322 (or 1318 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 669464 is about 818.2077975673. The cubic root of 669464 is about 87.4800607628.

The spelling of 669464 in words is "six hundred sixty-nine thousand, four hundred sixty-four".