66796487 has 2 divisors, whose sum is σ = 66796488. Its totient is φ = 66796486.

The previous prime is 66796453. The next prime is 66796517. The reversal of 66796487 is 78469766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66796487 - 2⁶ = 66796423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66796787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33398243 + 33398244.

It is an arithmetic number, because the mean of its divisors is an integer number (33398244).

Almost surely, 2^66796487 is an apocalyptic number.

66796487 is a deficient number, since it is larger than the sum of its proper divisors (1).

66796487 is an equidigital number, since it uses as much as digits as its factorization.

66796487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The square root of 66796487 is about 8172.9117822230. The cubic root of 66796487 is about 405.7431602108.

The spelling of 66796487 in words is "sixty-six million, seven hundred ninety-six thousand, four hundred eighty-seven".