39666001 has 2 divisors, whose sum is σ = 39666002. Its totient is φ = 39666000.

The previous prime is 39665971. The next prime is 39666017. The reversal of 39666001 is 10066693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 2027776 = 6135^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 39666001 - 2⁹ = 39665489 is a prime.

It is not a weakly prime, because it can be changed into another prime (39666031) 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, 19833000 + 19833001.

It is an arithmetic number, because the mean of its divisors is an integer number (19833001).

Almost surely, 2^39666001 is an apocalyptic number.

It is an amenable number.

39666001 is a deficient number, since it is larger than the sum of its proper divisors (1).

39666001 is an equidigital number, since it uses as much as digits as its factorization.

39666001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 39666001 is about 6298.0950294514. The cubic root of 39666001 is about 341.0406438140.

The spelling of 39666001 in words is "thirty-nine million, six hundred sixty-six thousand, one".