66628343 has 2 divisors, whose sum is σ = 66628344. Its totient is φ = 66628342.

The previous prime is 66628339. The next prime is 66628349. The reversal of 66628343 is 34382666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66628343 - 2² = 66628339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66628297 and 66628306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66628349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33314171 + 33314172.

It is an arithmetic number, because the mean of its divisors is an integer number (33314172).

Almost surely, 2^66628343 is an apocalyptic number.

66628343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66628343 is an equidigital number, since it uses as much as digits as its factorization.

66628343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 38.

The square root of 66628343 is about 8162.6186361976. The cubic root of 66628343 is about 405.4024207179.

The spelling of 66628343 in words is "sixty-six million, six hundred twenty-eight thousand, three hundred forty-three".