667473401009 has 8 divisors (see below), whose sum is σ = 683866754088. Its totient is φ = 651085453440.

The previous prime is 667473401003. The next prime is 667473401027. The reversal of 667473401009 is 900104374766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8105040784 + 659368360225 = 90028^2 + 812015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667473401009 - 2¹² = 667473396913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667473401003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100822 + ... + 1595855.

It is an arithmetic number, because the mean of its divisors is an integer number (85483344261).

Almost surely, 2^667473401009 is an apocalyptic number.

It is an amenable number.

667473401009 is a deficient number, since it is larger than the sum of its proper divisors (16393353079).

667473401009 is a wasteful number, since it uses less digits than its factorization.

667473401009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702755.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 667473401009 in words is "six hundred sixty-seven billion, four hundred seventy-three million, four hundred one thousand, nine".