669001 has 16 divisors (see below), whose sum is σ = 777600. Its totient is φ = 571648.

The previous prime is 668999. The next prime is 669023. The reversal of 669001 is 100966.

It is not a de Polignac number, because 669001 - 2¹ = 668999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11310 + ... + 11368.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁶⁶⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

669001 is a deficient number, since it is larger than the sum of its proper divisors (108599).

669001 is a wasteful number, since it uses less digits than its factorization.

669001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 669001 is about 817.9248131705. The cubic root of 669001 is about 87.4598890986.

Adding to 669001 its reverse (100966), we get a palindrome (769967).

The spelling of 669001 in words is "six hundred sixty-nine thousand, one".