6665769 has 18 divisors (see below), whose sum is σ = 10584938. Its totient is φ = 4039200.

The previous prime is 6665741. The next prime is 6665773. The reversal of 6665769 is 9675666.

It can be written as a sum of positive squares in only one way, i.e., 4460544 + 2205225 = 2112^2 + 1485^2 .

It is not a de Polignac number, because 6665769 - 2¹⁵ = 6633001 is a prime.

It is a super-2 number, since 2×6665769² = 88864952722722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665719) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1972 + ... + 4149.

Almost surely, 2^6665769 is an apocalyptic number.

It is an amenable number.

6665769 is a deficient number, since it is larger than the sum of its proper divisors (3919169).

6665769 is a wasteful number, since it uses less digits than its factorization.

6665769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149 (or 6135 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 6665769 is about 2581.8150592171. The cubic root of 6665769 is about 188.1987580303.

The spelling of 6665769 in words is "six million, six hundred sixty-five thousand, seven hundred sixty-nine".