668467772777 has 8 divisors (see below), whose sum is σ = 763970870016. Its totient is φ = 572966600832.

The previous prime is 668467772717. The next prime is 668467772851. The reversal of 668467772777 is 777277764866.

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

It is a cyclic number.

It is not a de Polignac number, because 668467772777 - 2¹² = 668467768681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668467772717) 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, 360953 + ... + 1211289.

It is an arithmetic number, because the mean of its divisors is an integer number (95496358752).

Almost surely, 2^668467772777 is an apocalyptic number.

It is an amenable number.

668467772777 is a deficient number, since it is larger than the sum of its proper divisors (95503097239).

668467772777 is a wasteful number, since it uses less digits than its factorization.

668467772777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962647.

The product of its digits is 1626379776, while the sum is 74.

The spelling of 668467772777 in words is "six hundred sixty-eight billion, four hundred sixty-seven million, seven hundred seventy-two thousand, seven hundred seventy-seven".