667040704067 has 4 divisors (see below), whose sum is σ = 667042766880. Its totient is φ = 667038641256.

The previous prime is 667040704051. The next prime is 667040704091. The reversal of 667040704067 is 760407040766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667040704067 - 2⁴ = 667040704051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667040704667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429128 + ... + 1232165.

It is an arithmetic number, because the mean of its divisors is an integer number (166760691720).

Almost surely, 2^667040704067 is an apocalyptic number.

667040704067 is a deficient number, since it is larger than the sum of its proper divisors (2062813).

667040704067 is a wasteful number, since it uses less digits than its factorization.

667040704067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062812.

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 667040704067 in words is "six hundred sixty-seven billion, forty million, seven hundred four thousand, sixty-seven".