66956459 has 2 divisors, whose sum is σ = 66956460. Its totient is φ = 66956458.

The previous prime is 66956429. The next prime is 66956471. The reversal of 66956459 is 95465966.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66956459 is a prime.

It is not a weakly prime, because it can be changed into another prime (66956429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33478229 + 33478230.

It is an arithmetic number, because the mean of its divisors is an integer number (33478230).

Almost surely, 2^66956459 is an apocalyptic number.

66956459 is a deficient number, since it is larger than the sum of its proper divisors (1).

66956459 is an equidigital number, since it uses as much as digits as its factorization.

66956459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 50.

The square root of 66956459 is about 8182.6926497333. The cubic root of 66956459 is about 406.0668089560.

The spelling of 66956459 in words is "sixty-six million, nine hundred fifty-six thousand, four hundred fifty-nine".