666666667407 has 8 divisors (see below), whose sum is σ = 957264958384. Its totient is φ = 410256410688.

The previous prime is 666666667399. The next prime is 666666667411. The reversal of 666666667407 is 704766666666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666666667407 - 2³ = 666666667399 is a prime.

It is a super-2 number, since 2×666666667407² (a number of 24 digits) 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 (666666667427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8547008518 + ... + 8547008595.

It is an arithmetic number, because the mean of its divisors is an integer number (119658119798).

Almost surely, 2^666666667407 is an apocalyptic number.

666666667407 is a deficient number, since it is larger than the sum of its proper divisors (290598290977).

666666667407 is a wasteful number, since it uses less digits than its factorization.

666666667407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17094017129.

The product of its (nonzero) digits is 329204736, while the sum is 66.

The spelling of 666666667407 in words is "six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-seven thousand, four hundred seven".