668246206 has 4 divisors (see below), whose sum is σ = 1002369312. Its totient is φ = 334123102.

The previous prime is 668246147. The next prime is 668246221. The reversal of 668246206 is 602642866.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167061550 + ... + 167061553.

It is an arithmetic number, because the mean of its divisors is an integer number (250592328).

Almost surely, 2^668246206 is an apocalyptic number.

668246206 is a deficient number, since it is larger than the sum of its proper divisors (334123106).

668246206 is a wasteful number, since it uses less digits than its factorization.

668246206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334123105.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 668246206 is about 25850.4585259140. The cubic root of 668246206 is about 874.2698479211.

The spelling of 668246206 in words is "six hundred sixty-eight million, two hundred forty-six thousand, two hundred six".