667422635487 has 4 divisors (see below), whose sum is σ = 889896847320. Its totient is φ = 444948423656.

The previous prime is 667422635471. The next prime is 667422635501. The reversal of 667422635487 is 784536224766.

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 667422635487 - 2⁴ = 667422635471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667422635487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667422635447) 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, 111237105912 + ... + 111237105917.

It is an arithmetic number, because the mean of its divisors is an integer number (222474211830).

Almost surely, 2^667422635487 is an apocalyptic number.

667422635487 is a deficient number, since it is larger than the sum of its proper divisors (222474211833).

667422635487 is a wasteful number, since it uses less digits than its factorization.

667422635487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222474211832.

The product of its digits is 81285120, while the sum is 60.

The spelling of 667422635487 in words is "six hundred sixty-seven billion, four hundred twenty-two million, six hundred thirty-five thousand, four hundred eighty-seven".