6866661394147 has 16 divisors (see below), whose sum is σ = 6955905856032. Its totient is φ = 6777814717440.

The previous prime is 6866661394139. The next prime is 6866661394169. The reversal of 6866661394147 is 7414931666686.

It is a cyclic number.

It is not a de Polignac number, because 6866661394147 - 2³ = 6866661394139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6866661395147) 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, 63213693 + ... + 63322225.

It is an arithmetic number, because the mean of its divisors is an integer number (434744116002).

Almost surely, 2^{6866661394147} is an apocalyptic number.

6866661394147 is a deficient number, since it is larger than the sum of its proper divisors (89244461885).

6866661394147 is a wasteful number, since it uses less digits than its factorization.

6866661394147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110358.

The product of its digits is 188116992, while the sum is 67.

The spelling of 6866661394147 in words is "six trillion, eight hundred sixty-six billion, six hundred sixty-one million, three hundred ninety-four thousand, one hundred forty-seven".