3666601 has 4 divisors (see below), whose sum is σ = 3859600. Its totient is φ = 3473604.

The previous prime is 3666599. The next prime is 3666613. The reversal of 3666601 is 1066663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1066663 = 13 ⋅82051.

It is a cyclic number.

It is not a de Polignac number, because 3666601 - 2¹ = 3666599 is a prime.

It is a Duffinian number.

3666601 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3666601.

It is not an unprimeable number, because it can be changed into a prime (3666661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96471 + ... + 96508.

It is an arithmetic number, because the mean of its divisors is an integer number (964900).

Almost surely, 2^3666601 is an apocalyptic number.

It is an amenable number.

3666601 is a deficient number, since it is larger than the sum of its proper divisors (192999).

3666601 is a wasteful number, since it uses less digits than its factorization.

3666601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192998.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 3666601 is about 1914.8370687868. The cubic root of 3666601 is about 154.2012464271.

The spelling of 3666601 in words is "three million, six hundred sixty-six thousand, six hundred one".