66806248007 has 2 divisors, whose sum is σ = 66806248008. Its totient is φ = 66806248006.

The previous prime is 66806247997. The next prime is 66806248031. The reversal of 66806248007 is 70084260866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66806248007 - 2⁶ = 66806247943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66806248087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33403124003 + 33403124004.

It is an arithmetic number, because the mean of its divisors is an integer number (33403124004).

Almost surely, 2^66806248007 is an apocalyptic number.

66806248007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66806248007 is an equidigital number, since it uses as much as digits as its factorization.

66806248007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 66806248007 in words is "sixty-six billion, eight hundred six million, two hundred forty-eight thousand, seven".