667193642485 has 8 divisors (see below), whose sum is σ = 802019952216. Its totient is φ = 532829859840.

The previous prime is 667193642477. The next prime is 667193642491. The reversal of 667193642485 is 584246391766.

It can be written as a sum of positive squares in 4 ways, for example, as 182990595076 + 484203047409 = 427774^2 + 695847^2 .

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

It is not a de Polignac number, because 667193642485 - 2³ = 667193642477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115628596 + ... + 115634365.

It is an arithmetic number, because the mean of its divisors is an integer number (100252494027).

Almost surely, 2^667193642485 is an apocalyptic number.

It is an amenable number.

667193642485 is a deficient number, since it is larger than the sum of its proper divisors (134826309731).

667193642485 is a wasteful number, since it uses less digits than its factorization.

667193642485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231263543.

The product of its digits is 52254720, while the sum is 61.

The spelling of 667193642485 in words is "six hundred sixty-seven billion, one hundred ninety-three million, six hundred forty-two thousand, four hundred eighty-five".