1966308401 has 2 divisors, whose sum is σ = 1966308402. Its totient is φ = 1966308400.

The previous prime is 1966308397. The next prime is 1966308413. The reversal of 1966308401 is 1048036691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1895731600 + 70576801 = 43540^2 + 8401^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966308401 - 2² = 1966308397 is a prime.

It is not a weakly prime, because it can be changed into another prime (1966308481) 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, 983154200 + 983154201.

It is an arithmetic number, because the mean of its divisors is an integer number (983154201).

Almost surely, 2^1966308401 is an apocalyptic number.

It is an amenable number.

1966308401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966308401 is an equidigital number, since it uses as much as digits as its factorization.

1966308401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1966308401 is about 44343.0761337100. The cubic root of 1966308401 is about 1252.8061545632.

The spelling of 1966308401 in words is "one billion, nine hundred sixty-six million, three hundred eight thousand, four hundred one".