6666712407 has 12 divisors (see below), whose sum is σ = 9631278904. Its totient is φ = 4443744240.

The previous prime is 6666712397. The next prime is 6666712433. The reversal of 6666712407 is 7042176666.

It is a happy number.

It is not a de Polignac number, because 6666712407 - 2¹⁰ = 6666711383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666712447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108 + ... + 115470.

Almost surely, 2^6666712407 is an apocalyptic number.

6666712407 is a deficient number, since it is larger than the sum of its proper divisors (2964566497).

6666712407 is a wasteful number, since it uses less digits than its factorization.

6666712407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121790 (or 121787 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 6666712407 is about 81649.9381934855. The cubic root of 6666712407 is about 1882.0763620824.

The spelling of 6666712407 in words is "six billion, six hundred sixty-six million, seven hundred twelve thousand, four hundred seven".