668401355102 has 16 divisors (see below), whose sum is σ = 1079773250640. Its totient is φ = 308479223232.

The previous prime is 668401355101. The next prime is 668401355161. The reversal of 668401355102 is 201553104866.

It is a self number, because there is not a number n which added to its sum of digits gives 668401355102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668401355101) 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, 37274 + ... + 1156802.

It is an arithmetic number, because the mean of its divisors is an integer number (67485828165).

Almost surely, 2^668401355102 is an apocalyptic number.

668401355102 is a deficient number, since it is larger than the sum of its proper divisors (411371895538).

668401355102 is a wasteful number, since it uses less digits than its factorization.

668401355102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142507.

The product of its (nonzero) digits is 172800, while the sum is 41.

Adding to 668401355102 its reverse (201553104866), we get a palindrome (869954459968).

The spelling of 668401355102 in words is "six hundred sixty-eight billion, four hundred one million, three hundred fifty-five thousand, one hundred two".