4015663 has 4 divisors (see below), whose sum is σ = 4113648. Its totient is φ = 3917680.

The previous prime is 4015643. The next prime is 4015673. The reversal of 4015663 is 3665104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4015663 - 2¹⁷ = 3884591 is a prime.

It is a super-2 number, since 2×4015663² = 32251098659138, which contains 22 as substring.

It is a Duffinian number.

4015663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4015643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48931 + ... + 49012.

It is an arithmetic number, because the mean of its divisors is an integer number (1028412).

Almost surely, 2^4015663 is an apocalyptic number.

4015663 is a deficient number, since it is larger than the sum of its proper divisors (97985).

4015663 is an equidigital number, since it uses as much as digits as its factorization.

4015663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97984.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 4015663 is about 2003.9119242122. The cubic root of 4015663 is about 158.9470308640.

The spelling of 4015663 in words is "four million, fifteen thousand, six hundred sixty-three".