3666534 has 16 divisors (see below), whose sum is σ = 7354800. Its totient is φ = 1218560.

The previous prime is 3666529. The next prime is 3666539. The reversal of 3666534 is 4356663.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3666529) and next prime (3666539).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 3666495 and 3666504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666539) 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, 2014 + ... + 3374.

It is an arithmetic number, because the mean of its divisors is an integer number (459675).

Almost surely, 2^3666534 is an apocalyptic number.

3666534 is an abundant number, since it is smaller than the sum of its proper divisors (3688266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3666534 is a wasteful number, since it uses less digits than its factorization.

3666534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815.

The product of its digits is 38880, while the sum is 33.

The square root of 3666534 is about 1914.8195737458. The cubic root of 3666534 is about 154.2003071787.

The spelling of 3666534 in words is "three million, six hundred sixty-six thousand, five hundred thirty-four".