3666637 has 8 divisors (see below), whose sum is σ = 4120704. Its totient is φ = 3237168.

The previous prime is 3666629. The next prime is 3666647. The reversal of 3666637 is 7366663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3666637 - 2³ = 3666629 is a prime.

It is a d-powerful number, because it can be written as 3 + 6⁵ + 6⁷ + 6⁸ + 6⁸ + 3⁹ + 7 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3666596 and 3666605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5833 + ... + 6430.

It is an arithmetic number, because the mean of its divisors is an integer number (515088).

Almost surely, 2^3666637 is an apocalyptic number.

It is an amenable number.

3666637 is a deficient number, since it is larger than the sum of its proper divisors (454067).

3666637 is a wasteful number, since it uses less digits than its factorization.

3666637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12299.

The product of its digits is 81648, while the sum is 37.

The square root of 3666637 is about 1914.8464690413. The cubic root of 3666637 is about 154.2017510931.

It can be divided in two parts, 36 and 66637, that multiplied together give a palindrome (2398932).

The spelling of 3666637 in words is "three million, six hundred sixty-six thousand, six hundred thirty-seven".