6660069 has 16 divisors (see below), whose sum is σ = 9609600. Its totient is φ = 4078656.

The previous prime is 6660061. The next prime is 6660091. The reversal of 6660069 is 9600666.

It is not a de Polignac number, because 6660069 - 2³ = 6660061 is a prime.

It is a super-2 number, since 2×6660069² = 88713038169522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14952 + ... + 15390.

It is an arithmetic number, because the mean of its divisors is an integer number (600600).

Almost surely, 2^6660069 is an apocalyptic number.

It is an amenable number.

6660069 is a deficient number, since it is larger than the sum of its proper divisors (2949531).

6660069 is a wasteful number, since it uses less digits than its factorization.

6660069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 6660069 is about 2580.7109485566. The cubic root of 6660069 is about 188.1450988633.

The spelling of 6660069 in words is "six million, six hundred sixty thousand, sixty-nine".