66951323 has 2 divisors, whose sum is σ = 66951324. Its totient is φ = 66951322.

The previous prime is 66951317. The next prime is 66951331. The reversal of 66951323 is 32315966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66951323 - 2¹⁴ = 66934939 is a prime.

It is a Sophie Germain prime.

It is equal to p_3949064 and since 66951323 and 3949064 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66951223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33475661 + 33475662.

It is an arithmetic number, because the mean of its divisors is an integer number (33475662).

Almost surely, 2^66951323 is an apocalyptic number.

66951323 is a deficient number, since it is larger than the sum of its proper divisors (1).

66951323 is an equidigital number, since it uses as much as digits as its factorization.

66951323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 35.

The square root of 66951323 is about 8182.3788105905. The cubic root of 66951323 is about 406.0564260272.

The spelling of 66951323 in words is "sixty-six million, nine hundred fifty-one thousand, three hundred twenty-three".