3665656 has 8 divisors (see below), whose sum is σ = 6873120. Its totient is φ = 1832824.

The previous prime is 3665653. The next prime is 3665677. The reversal of 3665656 is 6565663.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229096 + ... + 229111.

It is an arithmetic number, because the mean of its divisors is an integer number (859140).

Almost surely, 2^3665656 is an apocalyptic number.

It is an amenable number.

3665656 is a deficient number, since it is larger than the sum of its proper divisors (3207464).

3665656 is a wasteful number, since it uses less digits than its factorization.

3665656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458213 (or 458209 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 3665656 is about 1914.5902955985. The cubic root of 3665656 is about 154.1879977626.

Subtracting from 3665656 its product of digits (97200), we obtain a triangular number (3568456 = T₂₆₇₁).

The spelling of 3665656 in words is "three million, six hundred sixty-five thousand, six hundred fifty-six".