66625649267 has 2 divisors, whose sum is σ = 66625649268. Its totient is φ = 66625649266.

The previous prime is 66625649243. The next prime is 66625649323. The reversal of 66625649267 is 76294652666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66625649267 - 2⁸ = 66625649011 is a prime.

It is not a weakly prime, because it can be changed into another prime (66625649227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33312824633 + 33312824634.

It is an arithmetic number, because the mean of its divisors is an integer number (33312824634).

Almost surely, 2^66625649267 is an apocalyptic number.

66625649267 is a deficient number, since it is larger than the sum of its proper divisors (1).

66625649267 is an equidigital number, since it uses as much as digits as its factorization.

66625649267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 59.

The spelling of 66625649267 in words is "sixty-six billion, six hundred twenty-five million, six hundred forty-nine thousand, two hundred sixty-seven".