668536007 has 8 divisors (see below), whose sum is σ = 685002384. Its totient is φ = 652111488.

The previous prime is 668535997. The next prime is 668536013. The reversal of 668536007 is 700635866.

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 668536007 - 2¹⁰ = 668534983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668536087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23183 + ... + 43295.

It is an arithmetic number, because the mean of its divisors is an integer number (85625298).

Almost surely, 2^668536007 is an apocalyptic number.

668536007 is a deficient number, since it is larger than the sum of its proper divisors (16466377).

668536007 is a wasteful number, since it uses less digits than its factorization.

668536007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 668536007 is about 25856.0632540996. The cubic root of 668536007 is about 874.3962123543.

The spelling of 668536007 in words is "six hundred sixty-eight million, five hundred thirty-six thousand, seven".