668709041 has 32 divisors (see below), whose sum is σ = 905431296. Its totient is φ = 480902400.

The previous prime is 668709011. The next prime is 668709049. The reversal of 668709041 is 140907866.

It is not a de Polignac number, because 668709041 - 2²⁶ = 601600177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668709041.

It is not an unprimeable number, because it can be changed into a prime (668709049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118361 + ... + 123881.

It is an arithmetic number, because the mean of its divisors is an integer number (28294728).

Almost surely, 2^668709041 is an apocalyptic number.

It is an amenable number.

668709041 is a deficient number, since it is larger than the sum of its proper divisors (236722255).

668709041 is a wasteful number, since it uses less digits than its factorization.

668709041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5574 (or 5552 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 668709041 is about 25859.4091386482. The cubic root of 668709041 is about 874.4716444533.

The spelling of 668709041 in words is "six hundred sixty-eight million, seven hundred nine thousand, forty-one".