69669 has 6 divisors (see below), whose sum is σ = 100646. Its totient is φ = 46440.

The previous prime is 69661. The next prime is 69677. The reversal of 69669 is 96696.

It is an interprime number because it is at equal distance from previous prime (69661) and next prime (69677).

It can be written as a sum of positive squares in only one way, i.e., 50625 + 19044 = 225^2 + 138^2 .

It is not a de Polignac number, because 69669 - 2³ = 69661 is a prime.

It is a super-2 number, since 2×69669² = 9707539122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3862 + ... + 3879.

2⁶⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

69669 is a deficient number, since it is larger than the sum of its proper divisors (30977).

69669 is a wasteful number, since it uses less digits than its factorization.

69669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7747 (or 7744 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 69669 is about 263.9488586829. The cubic root of 69669 is about 41.1477910336.

The spelling of 69669 in words is "sixty-nine thousand, six hundred sixty-nine".