668550002 has 8 divisors (see below), whose sum is σ = 1002979200. Its totient is φ = 334223604.

The previous prime is 668549989. The next prime is 668550011. The reversal of 668550002 is 200055866.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6602 + ... + 37157.

It is an arithmetic number, because the mean of its divisors is an integer number (125372400).

Almost surely, 2^668550002 is an apocalyptic number.

668550002 is a deficient number, since it is larger than the sum of its proper divisors (334429198).

668550002 is a wasteful number, since it uses less digits than its factorization.

668550002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51400.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 668550002 is about 25856.3338855299. Note that the first 3 decimals coincide. The cubic root of 668550002 is about 874.4023137906.

The spelling of 668550002 in words is "six hundred sixty-eight million, five hundred fifty thousand, two".