3661003863 has 48 divisors (see below), whose sum is σ = 6079656960. Its totient is φ = 2101176000.

The previous prime is 3661003849. The next prime is 3661003889. The reversal of 3661003863 is 3683001663.

3661003863 is a `hidden beast` number, since 3 + 6 + 610 + 0 + 38 + 6 + 3 = 666.

It is not a de Polignac number, because 3661003863 - 2¹⁷ = 3660872791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661003663) 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 in 47 ways as a sum of consecutive naturals, for example, 222018 + ... + 237936.

It is an arithmetic number, because the mean of its divisors is an integer number (126659520).

Almost surely, 2^3661003863 is an apocalyptic number.

3661003863 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3661003863 is a deficient number, since it is larger than the sum of its proper divisors (2418653097).

3661003863 is a wasteful number, since it uses less digits than its factorization.

3661003863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16060 (or 16057 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 3661003863 is about 60506.2299519645. The cubic root of 3661003863 is about 1541.2274274414.

It can be divided in two parts, 366100 and 3863, that added together give a palindrome (369963).

The spelling of 3661003863 in words is "three billion, six hundred sixty-one million, three thousand, eight hundred sixty-three".