669501 has 12 divisors (see below), whose sum is σ = 1105312. Its totient is φ = 382536.

The previous prime is 669481. The next prime is 669527. The reversal of 669501 is 105966.

It is not a de Polignac number, because 669501 - 2⁶ = 669437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5251 + ... + 5376.

2⁶⁶⁹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

669501 is a deficient number, since it is larger than the sum of its proper divisors (435811).

669501 is a wasteful number, since it uses less digits than its factorization.

669501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10640 (or 10637 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 669501 is about 818.2304076481. The cubic root of 669501 is about 87.4816723519.

The spelling of 669501 in words is "six hundred sixty-nine thousand, five hundred one".