3665979 has 10 divisors (see below), whose sum is σ = 5476460. Its totient is φ = 2443932.

The previous prime is 3665941. The next prime is 3665989. The reversal of 3665979 is 9795663.

It is not a de Polignac number, because 3665979 - 2¹⁷ = 3534907 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 6² + 6² + 5⁹ + 9² + 7⁶ + 9³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665939) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22549 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (547646).

Almost surely, 2^3665979 is an apocalyptic number.

3665979 is a deficient number, since it is larger than the sum of its proper divisors (1810481).

3665979 is an equidigital number, since it uses as much as digits as its factorization.

3665979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45271 (or 45262 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 3665979 is about 1914.6746459908. The cubic root of 3665979 is about 154.1925263982.

The spelling of 3665979 in words is "three million, six hundred sixty-five thousand, nine hundred seventy-nine".