66320068 has 6 divisors (see below), whose sum is σ = 116060126. Its totient is φ = 33160032.

The previous prime is 66320057. The next prime is 66320101. The reversal of 66320068 is 86002366.

It can be written as a sum of positive squares in only one way, i.e., 65804544 + 515524 = 8112^2 + 718^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8290005 + ... + 8290012.

Almost surely, 2^66320068 is an apocalyptic number.

It is an amenable number.

66320068 is a deficient number, since it is larger than the sum of its proper divisors (49740058).

66320068 is a wasteful number, since it uses less digits than its factorization.

66320068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16580021 (or 16580019 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66320068 is about 8143.7134036016. The cubic root of 66320068 is about 404.7762173767.

The spelling of 66320068 in words is "sixty-six million, three hundred twenty thousand, sixty-eight".