68660677 has 2 divisors, whose sum is σ = 68660678. Its totient is φ = 68660676.
The previous prime is 68660617. The next prime is 68660687. The reversal of 68660677 is 77606686.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 68459076 + 201601 = 8274^2 + 449^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-68660677 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (68660617) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330338 + 34330339.
It is an arithmetic number, because the mean of its divisors is an integer number (34330339).
Almost surely, 268660677 is an apocalyptic number.
It is an amenable number.
68660677 is a deficient number, since it is larger than the sum of its proper divisors (1).
68660677 is an equidigital number, since it uses as much as digits as its factorization.
68660677 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 508032, while the sum is 46.
The square root of 68660677 is about 8286.1738456298. The cubic root of 68660677 is about 409.4831420846.
The spelling of 68660677 in words is "sixty-eight million, six hundred sixty thousand, six hundred seventy-seven".
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