668122102 has 4 divisors (see below), whose sum is σ = 1002183156. Its totient is φ = 334061050.

The previous prime is 668122093. The next prime is 668122111. The reversal of 668122102 is 201221866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201221866 = 2 ⋅100610933.

It is an interprime number because it is at equal distance from previous prime (668122093) and next prime (668122111).

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, 167030524 + ... + 167030527.

It is an arithmetic number, because the mean of its divisors is an integer number (250545789).

Almost surely, 2^668122102 is an apocalyptic number.

668122102 is a deficient number, since it is larger than the sum of its proper divisors (334061054).

668122102 is a wasteful number, since it uses less digits than its factorization.

668122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334061053.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 668122102 is about 25848.0579928164. The cubic root of 668122102 is about 874.2157226094.

Adding to 668122102 its reverse (201221866), we get a palindrome (869343968).

The spelling of 668122102 in words is "six hundred sixty-eight million, one hundred twenty-two thousand, one hundred two".