667706872107 has 64 divisors (see below), whose sum is σ = 1028498480640. Its totient is φ = 381061324800.

The previous prime is 667706872051. The next prime is 667706872121. The reversal of 667706872107 is 701278607766.

It is not a de Polignac number, because 667706872107 - 2⁶ = 667706872043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (667706872207) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 283285573 + ... + 283287929.

It is an arithmetic number, because the mean of its divisors is an integer number (16070288760).

Almost surely, 2^667706872107 is an apocalyptic number.

667706872107 is a deficient number, since it is larger than the sum of its proper divisors (360791608533).

667706872107 is a wasteful number, since it uses less digits than its factorization.

667706872107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924.

The product of its (nonzero) digits is 8297856, while the sum is 57.

The spelling of 667706872107 in words is "six hundred sixty-seven billion, seven hundred six million, eight hundred seventy-two thousand, one hundred seven".