6665678 has 8 divisors (see below), whose sum is σ = 10029720. Its totient is φ = 3322440.

The previous prime is 6665671. The next prime is 6665689. The reversal of 6665678 is 8765666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665671) 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, 4373 + ... + 5696.

It is an arithmetic number, because the mean of its divisors is an integer number (1253715).

Almost surely, 2^6665678 is an apocalyptic number.

6665678 is a deficient number, since it is larger than the sum of its proper divisors (3364042).

6665678 is a wasteful number, since it uses less digits than its factorization.

6665678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10402.

The product of its digits is 362880, while the sum is 44.

The square root of 6665678 is about 2581.7974358962. The cubic root of 6665678 is about 188.1979016067.

The spelling of 6665678 in words is "six million, six hundred sixty-five thousand, six hundred seventy-eight".