668227761 has 12 divisors (see below), whose sum is σ = 965457792. Its totient is φ = 445374456.

The previous prime is 668227759. The next prime is 668227787. The reversal of 668227761 is 167722866.

668227761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668227761 - 2¹ = 668227759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668227711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47080 + ... + 59606.

It is an arithmetic number, because the mean of its divisors is an integer number (80454816).

Almost surely, 2^668227761 is an apocalyptic number.

It is an amenable number.

668227761 is a deficient number, since it is larger than the sum of its proper divisors (297230031).

668227761 is a wasteful number, since it uses less digits than its factorization.

668227761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18460 (or 18457 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 668227761 is about 25850.1017599544. The cubic root of 668227761 is about 874.2618039519.

It can be divided in two parts, 6682 and 27761, that added together give a palindrome (34443).

The spelling of 668227761 in words is "six hundred sixty-eight million, two hundred twenty-seven thousand, seven hundred sixty-one".