18066977 has 2 divisors, whose sum is σ = 18066978. Its totient is φ = 18066976.

The previous prime is 18066953. The next prime is 18066991. The reversal of 18066977 is 77966081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15241216 + 2825761 = 3904^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 18066977 - 2⁸ = 18066721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18066947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033488 + 9033489.

It is an arithmetic number, because the mean of its divisors is an integer number (9033489).

Almost surely, 2^18066977 is an apocalyptic number.

It is an amenable number.

18066977 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066977 is an equidigital number, since it uses as much as digits as its factorization.

18066977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 18066977 is about 4250.5266732489. The cubic root of 18066977 is about 262.3987915201.

The spelling of 18066977 in words is "eighteen million, sixty-six thousand, nine hundred seventy-seven".