3666955 has 4 divisors (see below), whose sum is σ = 4400352. Its totient is φ = 2933560.

The previous prime is 3666947. The next prime is 3666961. The reversal of 3666955 is 5596663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5596663 = 239 ⋅23417.

It is not a de Polignac number, because 3666955 - 2³ = 3666947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366691 + ... + 366700.

It is an arithmetic number, because the mean of its divisors is an integer number (1100088).

Almost surely, 2^3666955 is an apocalyptic number.

3666955 is a deficient number, since it is larger than the sum of its proper divisors (733397).

3666955 is an equidigital number, since it uses as much as digits as its factorization.

3666955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733396.

The product of its digits is 145800, while the sum is 40.

The square root of 3666955 is about 1914.9295026188. The cubic root of 3666955 is about 154.2062088327.

The spelling of 3666955 in words is "three million, six hundred sixty-six thousand, nine hundred fifty-five".