668052315451 has 2 divisors, whose sum is σ = 668052315452. Its totient is φ = 668052315450.

The previous prime is 668052315353. The next prime is 668052315479. The reversal of 668052315451 is 154513250866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668052315451 - 2⁹ = 668052314939 is a prime.

It is not a weakly prime, because it can be changed into another prime (668052315751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334026157725 + 334026157726.

It is an arithmetic number, because the mean of its divisors is an integer number (334026157726).

Almost surely, 2^668052315451 is an apocalyptic number.

668052315451 is a deficient number, since it is larger than the sum of its proper divisors (1).

668052315451 is an equidigital number, since it uses as much as digits as its factorization.

668052315451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864000, while the sum is 46.

It can be divided in two parts, 668052 and 315451, that added together give a triangular number (983503 = T₁₄₀₂).

The spelling of 668052315451 in words is "six hundred sixty-eight billion, fifty-two million, three hundred fifteen thousand, four hundred fifty-one".