6666671799 has 24 divisors (see below), whose sum is σ = 9945936000. Its totient is φ = 4298627520.

The previous prime is 6666671741. The next prime is 6666671849. The reversal of 6666671799 is 9971766666.

It is not a de Polignac number, because 6666671799 - 2¹² = 6666667703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666670799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 571477 + ... + 583025.

It is an arithmetic number, because the mean of its divisors is an integer number (414414000).

Almost surely, 2^6666671799 is an apocalyptic number.

6666671799 is a deficient number, since it is larger than the sum of its proper divisors (3279264201).

6666671799 is a wasteful number, since it uses less digits than its factorization.

6666671799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655 (or 13652 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The square root of 6666671799 is about 81649.6895217612. The cubic root of 6666671799 is about 1882.0725407330.

The spelling of 6666671799 in words is "six billion, six hundred sixty-six million, six hundred seventy-one thousand, seven hundred ninety-nine".