3663181801 has 2 divisors, whose sum is σ = 3663181802. Its totient is φ = 3663181800.

The previous prime is 3663181799. The next prime is 3663181807. The reversal of 3663181801 is 1081813663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3663154576 + 27225 = 60524^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 3663181801 - 2¹ = 3663181799 is a prime.

Together with 3663181799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3663181807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1831590900 + 1831590901.

It is an arithmetic number, because the mean of its divisors is an integer number (1831590901).

Almost surely, 2^3663181801 is an apocalyptic number.

It is an amenable number.

3663181801 is a deficient number, since it is larger than the sum of its proper divisors (1).

3663181801 is an equidigital number, since it uses as much as digits as its factorization.

3663181801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 3663181801 is about 60524.2249103613. The cubic root of 3663181801 is about 1541.5329932089.

The spelling of 3663181801 in words is "three billion, six hundred sixty-three million, one hundred eighty-one thousand, eight hundred one".