66259777007 has 2 divisors, whose sum is σ = 66259777008. Its totient is φ = 66259777006.

The previous prime is 66259776949. The next prime is 66259777009. The reversal of 66259777007 is 70077795266.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66259777007 is a prime.

Together with 66259777009, 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 (66259777009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33129888503 + 33129888504.

It is an arithmetic number, because the mean of its divisors is an integer number (33129888504).

Almost surely, 2^66259777007 is an apocalyptic number.

66259777007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66259777007 is an equidigital number, since it uses as much as digits as its factorization.

66259777007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7779240, while the sum is 56.

The spelling of 66259777007 in words is "sixty-six billion, two hundred fifty-nine million, seven hundred seventy-seven thousand, seven".