667406666667 has 8 divisors (see below), whose sum is σ = 958327521424. Its totient is φ = 410711794848.

The previous prime is 667406666627. The next prime is 667406666683. The reversal of 667406666667 is 766666604766.

667406666667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 667406666667 - 2¹¹ = 667406664619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667406666598 and 667406666607.

It is not an unprimeable number, because it can be changed into a prime (667406666617) 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, 8556495688 + ... + 8556495765.

It is an arithmetic number, because the mean of its divisors is an integer number (119790940178).

Almost surely, 2^667406666667 is an apocalyptic number.

667406666667 is a deficient number, since it is larger than the sum of its proper divisors (290920854757).

667406666667 is a wasteful number, since it uses less digits than its factorization.

667406666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17112991469.

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

The spelling of 667406666667 in words is "six hundred sixty-seven billion, four hundred six million, six hundred sixty-six thousand, six hundred sixty-seven".