3656660 has 24 divisors (see below), whose sum is σ = 8776320. Its totient is φ = 1253664.

The previous prime is 3656657. The next prime is 3656663. The reversal of 3656660 is 666563.

It is an interprime number because it is at equal distance from previous prime (3656657) and next prime (3656663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656663) 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, 12920 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (365680).

Almost surely, 2^3656660 is an apocalyptic number.

It is an amenable number.

3656660 is an abundant number, since it is smaller than the sum of its proper divisors (5119660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3656660 is a wasteful number, since it uses less digits than its factorization.

3656660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26135 (or 26133 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 3656660 is about 1912.2395247458. The cubic root of 3656660 is about 154.0617619251.

The spelling of 3656660 in words is "three million, six hundred fifty-six thousand, six hundred sixty".