667522553572067 has 4 divisors (see below), whose sum is σ = 667670464623240. Its totient is φ = 667374642520896.

The previous prime is 667522553572033. The next prime is 667522553572087. The reversal of 667522553572067 is 760275355225766.

It is a happy number.

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 667522553572067 - 2¹⁶ = 667522553506531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667522553571988 and 667522553572006.

It is not an unprimeable number, because it can be changed into a prime (667522553572087) 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, 73955518817 + ... + 73955527842.

It is an arithmetic number, because the mean of its divisors is an integer number (166917616155810).

Almost surely, 2^{667522553572067} is an apocalyptic number.

667522553572067 is a deficient number, since it is larger than the sum of its proper divisors (147911051173).

667522553572067 is a wasteful number, since it uses less digits than its factorization.

667522553572067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147911051172.

The product of its (nonzero) digits is 1111320000, while the sum is 68.

The spelling of 667522553572067 in words is "six hundred sixty-seven trillion, five hundred twenty-two billion, five hundred fifty-three million, five hundred seventy-two thousand, sixty-seven".