3666947 has 2 divisors, whose sum is σ = 3666948. Its totient is φ = 3666946.

The previous prime is 3666919. The next prime is 3666961. The reversal of 3666947 is 7496663.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3666947 is a prime.

It is not a weakly prime, because it can be changed into another prime (3666907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833473 + 1833474.

It is an arithmetic number, because the mean of its divisors is an integer number (1833474).

Almost surely, 2^3666947 is an apocalyptic number.

3666947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666947 is an equidigital number, since it uses as much as digits as its factorization.

3666947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 3666947 is about 1914.9274137679. The cubic root of 3666947 is about 154.2060966915.

The spelling of 3666947 in words is "three million, six hundred sixty-six thousand, nine hundred forty-seven".