66969 has 12 divisors (see below), whose sum is σ = 110656. Its totient is φ = 38232.

The previous prime is 66959. The next prime is 66973. The reversal of 66969 is 96966.

It is not a de Polignac number, because 66969 - 2⁷ = 66841 is a prime.

It is a super-2 number, since 2×66969² = 8969693922, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (66919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469 + ... + 594.

2⁶⁶⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

66969 is a deficient number, since it is larger than the sum of its proper divisors (43687).

66969 is a wasteful number, since it uses less digits than its factorization.

66969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1073 counting only the distinct ones).

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

The square root of 66969 is about 258.7836934585. The cubic root of 66969 is about 40.6092159589.

It can be divided in two parts, 66 and 969, that added together give a triangular number (1035 = T₄₅).

The spelling of 66969 in words is "sixty-six thousand, nine hundred sixty-nine".