3661911 has 24 divisors (see below), whose sum is σ = 5900544. Its totient is φ = 2169360.

The previous prime is 3661909. The next prime is 3661913. The reversal of 3661911 is 1191663.

3661911 = 149² + 150² + ... + 242².

3661911 is a `hidden beast` number, since 36 + 619 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (3661909) and next prime (3661913).

It is not a de Polignac number, because 3661911 - 2¹ = 3661909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661913) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4260 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (245856).

Almost surely, 2^3661911 is an apocalyptic number.

3661911 is a deficient number, since it is larger than the sum of its proper divisors (2238633).

3661911 is a wasteful number, since it uses less digits than its factorization.

3661911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 848 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 3661911 is about 1913.6120296445. The cubic root of 3661911 is about 154.1354713929.

The spelling of 3661911 in words is "three million, six hundred sixty-one thousand, nine hundred eleven".