6666743674 has 24 divisors (see below), whose sum is σ = 10651091220. Its totient is φ = 3128922432.

The previous prime is 6666743659. The next prime is 6666743689. The reversal of 6666743674 is 4763476666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6666743659) and next prime (6666743689).

It can be written as a sum of positive squares in 2 ways, for example, as 6232313025 + 434430649 = 78945^2 + 20843^2 .

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36342 + ... + 121054.

Almost surely, 2^6666743674 is an apocalyptic number.

6666743674 is a deficient number, since it is larger than the sum of its proper divisors (3984347546).

6666743674 is a wasteful number, since it uses less digits than its factorization.

6666743674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84862 (or 84843 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 55.

The square root of 6666743674 is about 81650.1296630936. The cubic root of 6666743674 is about 1882.0793044017.

The spelling of 6666743674 in words is "six billion, six hundred sixty-six million, seven hundred forty-three thousand, six hundred seventy-four".