667106139 has 12 divisors (see below), whose sum is σ = 1034695464. Its totient is φ = 381203424.

The previous prime is 667106137. The next prime is 667106147. The reversal of 667106139 is 931601766.

It is not a de Polignac number, because 667106139 - 2¹ = 667106137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667106097 and 667106106.

It is not an unprimeable number, because it can be changed into a prime (667106137) 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, 2268922 + ... + 2269215.

It is an arithmetic number, because the mean of its divisors is an integer number (86224622).

Almost surely, 2^667106139 is an apocalyptic number.

667106139 is a deficient number, since it is larger than the sum of its proper divisors (367589325).

667106139 is a wasteful number, since it uses less digits than its factorization.

667106139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538154 (or 4538147 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 667106139 is about 25828.3979177958. The cubic root of 667106139 is about 873.7723797944.

The spelling of 667106139 in words is "six hundred sixty-seven million, one hundred six thousand, one hundred thirty-nine".