66513479 has 2 divisors, whose sum is σ = 66513480. Its totient is φ = 66513478.

The previous prime is 66513373. The next prime is 66513481. The reversal of 66513479 is 97431566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66513479 - 2²⁴ = 49736263 is a prime.

Together with 66513481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66513179) 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, 33256739 + 33256740.

It is an arithmetic number, because the mean of its divisors is an integer number (33256740).

Almost surely, 2^66513479 is an apocalyptic number.

66513479 is a deficient number, since it is larger than the sum of its proper divisors (1).

66513479 is an equidigital number, since it uses as much as digits as its factorization.

66513479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 66513479 is about 8155.5796237913. The cubic root of 66513479 is about 405.1693220772.

The spelling of 66513479 in words is "sixty-six million, five hundred thirteen thousand, four hundred seventy-nine".