667320350507 has 4 divisors (see below), whose sum is σ = 667381176240. Its totient is φ = 667259524776.

The previous prime is 667320350503. The next prime is 667320350519. The reversal of 667320350507 is 705053023766.

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 667320350507 - 2² = 667320350503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667320350503) 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, 30396407 + ... + 30418352.

It is an arithmetic number, because the mean of its divisors is an integer number (166845294060).

Almost surely, 2^667320350507 is an apocalyptic number.

667320350507 is a deficient number, since it is larger than the sum of its proper divisors (60825733).

667320350507 is a wasteful number, since it uses less digits than its factorization.

667320350507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60825732.

The product of its (nonzero) digits is 793800, while the sum is 44.

The spelling of 667320350507 in words is "six hundred sixty-seven billion, three hundred twenty million, three hundred fifty thousand, five hundred seven".