666517337 has 2 divisors, whose sum is σ = 666517338. Its totient is φ = 666517336.

The previous prime is 666517331. The next prime is 666517343. The reversal of 666517337 is 733715666.

It is a balanced prime because it is at equal distance from previous prime (666517331) and next prime (666517343).

It can be written as a sum of positive squares in only one way, i.e., 610880656 + 55636681 = 24716^2 + 7459^2 .

It is a cyclic number.

It is not a de Polignac number, because 666517337 - 2²⁴ = 649740121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (666517331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333258668 + 333258669.

It is an arithmetic number, because the mean of its divisors is an integer number (333258669).

Almost surely, 2^666517337 is an apocalyptic number.

It is an amenable number.

666517337 is a deficient number, since it is larger than the sum of its proper divisors (1).

666517337 is an equidigital number, since it uses as much as digits as its factorization.

666517337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 44.

The square root of 666517337 is about 25816.9970562031. The cubic root of 666517337 is about 873.5152341258.

The spelling of 666517337 in words is "six hundred sixty-six million, five hundred seventeen thousand, three hundred thirty-seven".