668888235151 has 2 divisors, whose sum is σ = 668888235152. Its totient is φ = 668888235150.

The previous prime is 668888235131. The next prime is 668888235199. The reversal of 668888235151 is 151532888866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668888235151 - 2⁷ = 668888235023 is a prime.

It is a super-2 number, since 2×668888235151² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668888235151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668888235101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334444117575 + 334444117576.

It is an arithmetic number, because the mean of its divisors is an integer number (334444117576).

Almost surely, 2^668888235151 is an apocalyptic number.

668888235151 is a deficient number, since it is larger than the sum of its proper divisors (1).

668888235151 is an equidigital number, since it uses as much as digits as its factorization.

668888235151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22118400, while the sum is 61.

The spelling of 668888235151 in words is "six hundred sixty-eight billion, eight hundred eighty-eight million, two hundred thirty-five thousand, one hundred fifty-one".