667420568606 has 8 divisors (see below), whose sum is σ = 1092142748664. Its totient is φ = 303372985720.

The previous prime is 667420568587. The next prime is 667420568609. The reversal of 667420568606 is 606865024766.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667420568609) 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, 15168649265 + ... + 15168649308.

It is an arithmetic number, because the mean of its divisors is an integer number (136517843583).

Almost surely, 2^667420568606 is an apocalyptic number.

667420568606 is a deficient number, since it is larger than the sum of its proper divisors (424722180058).

667420568606 is a wasteful number, since it uses less digits than its factorization.

667420568606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30337298586.

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 667420568606 in words is "six hundred sixty-seven billion, four hundred twenty million, five hundred sixty-eight thousand, six hundred six".