3666837 has 4 divisors (see below), whose sum is σ = 4889120. Its totient is φ = 2444556.

The previous prime is 3666833. The next prime is 3666841. The reversal of 3666837 is 7386663.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (3666833) and next prime (3666841).

It is not a de Polignac number, because 3666837 - 2² = 3666833 is a prime.

It is a D-number.

It is a Duffinian number.

3666837 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3666795 and 3666804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666833) 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, 611137 + ... + 611142.

It is an arithmetic number, because the mean of its divisors is an integer number (1222280).

Almost surely, 2^3666837 is an apocalyptic number.

It is an amenable number.

3666837 is a deficient number, since it is larger than the sum of its proper divisors (1222283).

3666837 is a wasteful number, since it uses less digits than its factorization.

3666837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222282.

The product of its digits is 108864, while the sum is 39.

The square root of 3666837 is about 1914.8986918372. The cubic root of 3666837 is about 154.2045547330.

The spelling of 3666837 in words is "three million, six hundred sixty-six thousand, eight hundred thirty-seven".