668030876661 has 8 divisors (see below), whose sum is σ = 897721283584. Its totient is φ = 441847193760.

The previous prime is 668030876641. The next prime is 668030876699. The reversal of 668030876661 is 166678030866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668030876661 - 2¹⁹ = 668030352373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668030876641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876680560 + ... + 876681321.

It is an arithmetic number, because the mean of its divisors is an integer number (112215160448).

Almost surely, 2^668030876661 is an apocalyptic number.

It is an amenable number.

668030876661 is a deficient number, since it is larger than the sum of its proper divisors (229690406923).

668030876661 is a wasteful number, since it uses less digits than its factorization.

668030876661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753362011.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 668030876661 in words is "six hundred sixty-eight billion, thirty million, eight hundred seventy-six thousand, six hundred sixty-one".