668402002 has 16 divisors (see below), whose sum is σ = 1011438432. Its totient is φ = 331269120.

The previous prime is 668401999. The next prime is 668402029. The reversal of 668402002 is 200204866.

It is a super-2 number, since 2×668402002² = 893522472555216008, which contains 22 as substring.

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, 105373 + ... + 111535.

It is an arithmetic number, because the mean of its divisors is an integer number (63214902).

Almost surely, 2^668402002 is an apocalyptic number.

668402002 is a deficient number, since it is larger than the sum of its proper divisors (343036430).

668402002 is a wasteful number, since it uses less digits than its factorization.

668402002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 668402002 is about 25853.4717591274. The cubic root of 668402002 is about 874.3377855366.

Adding to 668402002 its reverse (200204866), we get a palindrome (868606868).

The spelling of 668402002 in words is "six hundred sixty-eight million, four hundred two thousand, two".