3665655 has 48 divisors (see below), whose sum is σ = 7547904. Its totient is φ = 1671840.

The previous prime is 3665653. The next prime is 3665677. The reversal of 3665655 is 5565663.

It is a happy number.

3665655 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 3665655 - 2¹ = 3665653 is a prime.

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 in 47 ways as a sum of consecutive naturals, for example, 8290 + ... + 8720.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

Almost surely, 2^3665655 is an apocalyptic number.

3665655 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3665655 is an abundant number, since it is smaller than the sum of its proper divisors (3882249).

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

3665655 is an equidigital number, since it uses as much as digits as its factorization.

3665655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 446 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 3665655 is about 1914.5900344460. The cubic root of 3665655 is about 154.1879837417.

The spelling of 3665655 in words is "three million, six hundred sixty-five thousand, six hundred fifty-five".