66900343 has 2 divisors, whose sum is σ = 66900344. Its totient is φ = 66900342.

The previous prime is 66900341. The next prime is 66900377. The reversal of 66900343 is 34300966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66900343 - 2¹ = 66900341 is a prime.

Together with 66900341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66900341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33450171 + 33450172.

It is an arithmetic number, because the mean of its divisors is an integer number (33450172).

Almost surely, 2^66900343 is an apocalyptic number.

66900343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66900343 is an equidigital number, since it uses as much as digits as its factorization.

66900343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 66900343 is about 8179.2629863576. The cubic root of 66900343 is about 405.9533361399.

The spelling of 66900343 in words is "sixty-six million, nine hundred thousand, three hundred forty-three".