6669505 has 4 divisors (see below), whose sum is σ = 8003412. Its totient is φ = 5335600.

The previous prime is 6669503. The next prime is 6669521. The reversal of 6669505 is 5059666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 5683456 = 993^2 + 2384^2 .

It is not a de Polignac number, because 6669505 - 2¹ = 6669503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6669503) 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, 666946 + ... + 666955.

It is an arithmetic number, because the mean of its divisors is an integer number (2000853).

Almost surely, 2^6669505 is an apocalyptic number.

It is an amenable number.

6669505 is a deficient number, since it is larger than the sum of its proper divisors (1333907).

6669505 is a wasteful number, since it uses less digits than its factorization.

6669505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333906.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 6669505 is about 2582.5384798682. The cubic root of 6669505 is about 188.2339117258.

The spelling of 6669505 in words is "six million, six hundred sixty-nine thousand, five hundred five".