6666394 has 16 divisors (see below), whose sum is σ = 11567808. Its totient is φ = 2822112.

The previous prime is 6666391. The next prime is 6666437. The reversal of 6666394 is 4936666.

It is not an unprimeable number, because it can be changed into a prime (6666391) 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, 1707 + ... + 4030.

It is an arithmetic number, because the mean of its divisors is an integer number (722988).

Almost surely, 2^6666394 is an apocalyptic number.

6666394 is a deficient number, since it is larger than the sum of its proper divisors (4901414).

6666394 is a wasteful number, since it uses less digits than its factorization.

6666394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5829.

The product of its digits is 139968, while the sum is 40.

The square root of 6666394 is about 2581.9360952587. The cubic root of 6666394 is about 188.2046398497.

The spelling of 6666394 in words is "six million, six hundred sixty-six thousand, three hundred ninety-four".