3666629 has 2 divisors, whose sum is σ = 3666630. Its totient is φ = 3666628.

The previous prime is 3666613. The next prime is 3666647. The reversal of 3666629 is 9266663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2553604 + 1113025 = 1598^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666629 - 2⁴ = 3666613 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3666592 and 3666601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3666659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833314 + 1833315.

It is an arithmetic number, because the mean of its divisors is an integer number (1833315).

Almost surely, 2^3666629 is an apocalyptic number.

It is an amenable number.

3666629 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666629 is an equidigital number, since it uses as much as digits as its factorization.

3666629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 3666629 is about 1914.8443800999. The cubic root of 3666629 is about 154.2016389453.

The spelling of 3666629 in words is "three million, six hundred sixty-six thousand, six hundred twenty-nine".