3861663 has 8 divisors (see below), whose sum is σ = 5545008. Its totient is φ = 2376384.

The previous prime is 3861659. The next prime is 3861709. The reversal of 3861663 is 3661683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3861663 - 2² = 3861659 is a prime.

It is a super-2 number, since 2×3861663² = 29824882251138, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49470 + ... + 49547.

It is an arithmetic number, because the mean of its divisors is an integer number (693126).

Almost surely, 2^3861663 is an apocalyptic number.

3861663 is a deficient number, since it is larger than the sum of its proper divisors (1683345).

3861663 is a wasteful number, since it uses less digits than its factorization.

3861663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99033.

The product of its digits is 15552, while the sum is 33.

The square root of 3861663 is about 1965.1114472213. Note that the first 3 decimals coincide. The cubic root of 3861663 is about 156.8886250818. Note that the first 3 decimals are identical.

The spelling of 3861663 in words is "three million, eight hundred sixty-one thousand, six hundred sixty-three".