3663657 has 16 divisors (see below), whose sum is σ = 5616000. Its totient is φ = 2357712.

The previous prime is 3663617. The next prime is 3663659. The reversal of 3663657 is 7563663.

It is not a de Polignac number, because 3663657 - 2¹⁹ = 3139369 is a prime.

It is a super-2 number, since 2×3663657² = 26844765227298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3663659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1557 + ... + 3122.

It is an arithmetic number, because the mean of its divisors is an integer number (351000).

Almost surely, 2^3663657 is an apocalyptic number.

It is an amenable number.

3663657 is a deficient number, since it is larger than the sum of its proper divisors (1952343).

3663657 is a wasteful number, since it uses less digits than its factorization.

3663657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717 (or 4711 counting only the distinct ones).

The product of its digits is 68040, while the sum is 36.

The square root of 3663657 is about 1914.0681806038. The cubic root of 3663657 is about 154.1599647764.

The spelling of 3663657 in words is "three million, six hundred sixty-three thousand, six hundred fifty-seven".