66769 has 4 divisors (see below), whose sum is σ = 69696. Its totient is φ = 63844.

The previous prime is 66763. The next prime is 66791. The reversal of 66769 is 96766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96766 = 2 ⋅48383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66769 is a prime.

It is a super-2 number, since 2×66769² = 8916198722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66763) 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, 1429 + ... + 1474.

It is an arithmetic number, because the mean of its divisors is an integer number (17424).

2⁶⁶⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

66769 is a deficient number, since it is larger than the sum of its proper divisors (2927).

66769 is a wasteful number, since it uses less digits than its factorization.

66769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926.

The product of its digits is 13608, while the sum is 34.

The square root of 66769 is about 258.3969814065. The cubic root of 66769 is about 40.5687497641.

The spelling of 66769 in words is "sixty-six thousand, seven hundred sixty-nine".