66466801 has 2 divisors, whose sum is σ = 66466802. Its totient is φ = 66466800.

The previous prime is 66466793. The next prime is 66466859. The reversal of 66466801 is 10866466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 1825201 = 8040^2 + 1351^2 .

It is a cyclic number.

It is not a de Polignac number, because 66466801 - 2³ = 66466793 is a prime.

It is not a weakly prime, because it can be changed into another prime (66466861) by changing a digit.

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, 33233400 + 33233401.

It is an arithmetic number, because the mean of its divisors is an integer number (33233401).

Almost surely, 2^66466801 is an apocalyptic number.

It is an amenable number.

66466801 is a deficient number, since it is larger than the sum of its proper divisors (1).

66466801 is an equidigital number, since it uses as much as digits as its factorization.

66466801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 66466801 is about 8152.7173997386. The cubic root of 66466801 is about 405.0745196413.

The spelling of 66466801 in words is "sixty-six million, four hundred sixty-six thousand, eight hundred one".