6666489 has 8 divisors (see below), whose sum is σ = 9876320. Its totient is φ = 4444308.

The previous prime is 6666487. The next prime is 6666509. The reversal of 6666489 is 9846666.

It is not a de Polignac number, because 6666489 - 2¹ = 6666487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123427 + ... + 123480.

It is an arithmetic number, because the mean of its divisors is an integer number (1234540).

Almost surely, 2^6666489 is an apocalyptic number.

It is an amenable number.

6666489 is a deficient number, since it is larger than the sum of its proper divisors (3209831).

6666489 is a wasteful number, since it uses less digits than its factorization.

6666489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246916 (or 246910 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 6666489 is about 2581.9544922403. The cubic root of 6666489 is about 188.2055338540.

The spelling of 6666489 in words is "six million, six hundred sixty-six thousand, four hundred eighty-nine".