3521663 has 4 divisors (see below), whose sum is σ = 3596640. Its totient is φ = 3446688.

The previous prime is 3521659. The next prime is 3521677. The reversal of 3521663 is 3661253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3661253 = 47 ⋅77899.

It is a cyclic number.

It is not a de Polignac number, because 3521663 - 2² = 3521659 is a prime.

It is a super-2 number, since 2×3521663² = 24804220571138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37418 + ... + 37511.

It is an arithmetic number, because the mean of its divisors is an integer number (899160).

Almost surely, 2^3521663 is an apocalyptic number.

3521663 is a deficient number, since it is larger than the sum of its proper divisors (74977).

3521663 is an equidigital number, since it uses as much as digits as its factorization.

3521663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74976.

The product of its digits is 3240, while the sum is 26.

The square root of 3521663 is about 1876.6094425852. The cubic root of 3521663 is about 152.1420503784.

The spelling of 3521663 in words is "three million, five hundred twenty-one thousand, six hundred sixty-three".