668756162 has 4 divisors (see below), whose sum is σ = 1003134246. Its totient is φ = 334378080.

The previous prime is 668756147. The next prime is 668756189. The reversal of 668756162 is 261657866.

668756162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 261657866 = 2 ⋅130828933.

It can be written as a sum of positive squares in only one way, i.e., 627552601 + 41203561 = 25051^2 + 6419^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167189039 + ... + 167189042.

Almost surely, 2^668756162 is an apocalyptic number.

668756162 is a deficient number, since it is larger than the sum of its proper divisors (334378084).

668756162 is a wasteful number, since it uses less digits than its factorization.

668756162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334378083.

The product of its digits is 725760, while the sum is 47.

The square root of 668756162 is about 25860.3202223020. The cubic root of 668756162 is about 874.4921840343.

It can be divided in two parts, 66875 and 6162, that added together give a palindrome (73037).

The spelling of 668756162 in words is "six hundred sixty-eight million, seven hundred fifty-six thousand, one hundred sixty-two".