668898187774 has 32 divisors (see below), whose sum is σ = 1068540984000. Its totient is φ = 312948979200.

The previous prime is 668898187753. The next prime is 668898187777. The reversal of 668898187774 is 477781898866.

It is a super-3 number, since 3×668898187774³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668898187694 and 668898187703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668898187777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8764572 + ... + 8840560.

It is an arithmetic number, because the mean of its divisors is an integer number (33391905750).

Almost surely, 2^668898187774 is an apocalyptic number.

668898187774 is a deficient number, since it is larger than the sum of its proper divisors (399642796226).

668898187774 is a wasteful number, since it uses less digits than its factorization.

668898187774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77508.

The product of its digits is 1820786688, while the sum is 79.

The spelling of 668898187774 in words is "six hundred sixty-eight billion, eight hundred ninety-eight million, one hundred eighty-seven thousand, seven hundred seventy-four".