6660369 has 6 divisors (see below), whose sum is σ = 9620546. Its totient is φ = 4440240.

The previous prime is 6660359. The next prime is 6660371. The reversal of 6660369 is 9630666.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 3969 = 2580^2 + 63^2 .

It is not a de Polignac number, because 6660369 - 2⁵ = 6660337 is a prime.

It is a super-2 number, since 2×6660369² = 88721030432322, which contains 22 as substring.

It is a Duffinian number.

6660369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6660349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370012 + ... + 370029.

Almost surely, 2^6660369 is an apocalyptic number.

It is an amenable number.

6660369 is a deficient number, since it is larger than the sum of its proper divisors (2960177).

6660369 is a wasteful number, since it uses less digits than its factorization.

6660369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740047 (or 740044 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 6660369 is about 2580.7690714204. The cubic root of 6660369 is about 188.1479237931.

The spelling of 6660369 in words is "six million, six hundred sixty thousand, three hundred sixty-nine".