667701601009 has 4 divisors (see below), whose sum is σ = 670695778816. Its totient is φ = 664707423204.

The previous prime is 667701600919. The next prime is 667701601027. The reversal of 667701601009 is 900106107766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667701601009 - 2³⁹ = 117945787121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667701691009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497088569 + ... + 1497089014.

It is an arithmetic number, because the mean of its divisors is an integer number (167673944704).

Almost surely, 2^667701601009 is an apocalyptic number.

It is an amenable number.

667701601009 is a deficient number, since it is larger than the sum of its proper divisors (2994177807).

667701601009 is a wasteful number, since it uses less digits than its factorization.

667701601009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994177806.

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 667701601009 in words is "six hundred sixty-seven billion, seven hundred one million, six hundred one thousand, nine".