3665994 has 16 divisors (see below), whose sum is σ = 7351968. Its totient is φ = 1218672.

The previous prime is 3665989. The next prime is 3666001. The reversal of 3665994 is 4995663.

It is a d-powerful number, because it can be written as 3¹³ + 6³ + 6³ + 5⁹ + 9⁵ + 9⁵ + 4² .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724 + ... + 3840.

It is an arithmetic number, because the mean of its divisors is an integer number (459498).

Almost surely, 2^3665994 is an apocalyptic number.

3665994 is an abundant number, since it is smaller than the sum of its proper divisors (3685974).

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

3665994 is a wasteful number, since it uses less digits than its factorization.

3665994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669.

The product of its digits is 174960, while the sum is 42.

The square root of 3665994 is about 1914.6785631014. The cubic root of 3665994 is about 154.1927366999.

The spelling of 3665994 in words is "three million, six hundred sixty-five thousand, nine hundred ninety-four".