6666074669 has 4 divisors (see below), whose sum is σ = 6685855644. Its totient is φ = 6646293696.

The previous prime is 6666074651. The next prime is 6666074683. The reversal of 6666074669 is 9664706666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2720978569 + 3945096100 = 52163^2 + 62810^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666074669 - 2⁸ = 6666074413 is a prime.

It is a super-2 number, since 2×6666074669² = 88873102985366919122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666074609) 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, 9889982 + ... + 9890655.

It is an arithmetic number, because the mean of its divisors is an integer number (1671463911).

Almost surely, 2^6666074669 is an apocalyptic number.

It is an amenable number.

6666074669 is a deficient number, since it is larger than the sum of its proper divisors (19780975).

6666074669 is a wasteful number, since it uses less digits than its factorization.

6666074669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19780974.

The product of its (nonzero) digits is 11757312, while the sum is 56.

The square root of 6666074669 is about 81646.0327817586. The cubic root of 6666074669 is about 1882.0163469997.

The spelling of 6666074669 in words is "six billion, six hundred sixty-six million, seventy-four thousand, six hundred sixty-nine".