668081334 has 16 divisors (see below), whose sum is σ = 1414760688. Its totient is φ = 209594112.

The previous prime is 668081303. The next prime is 668081353. The reversal of 668081334 is 433180866.

It is a junction number, because it is equal to n+sod(n) for n = 668081292 and 668081301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3274807 + ... + 3275010.

It is an arithmetic number, because the mean of its divisors is an integer number (88422543).

Almost surely, 2^668081334 is an apocalyptic number.

668081334 is an abundant number, since it is smaller than the sum of its proper divisors (746679354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668081334 is a wasteful number, since it uses less digits than its factorization.

668081334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549839.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 668081334 is about 25847.2693722180. The cubic root of 668081334 is about 874.1979410535.

The spelling of 668081334 in words is "six hundred sixty-eight million, eighty-one thousand, three hundred thirty-four".