66683297251 has 2 divisors, whose sum is σ = 66683297252. Its totient is φ = 66683297250.

The previous prime is 66683297201. The next prime is 66683297279. The reversal of 66683297251 is 15279238666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66683297251 - 2¹⁹ = 66682772963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66683297192 and 66683297201.

It is not a weakly prime, because it can be changed into another prime (66683297201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33341648625 + 33341648626.

It is an arithmetic number, because the mean of its divisors is an integer number (33341648626).

Almost surely, 2^66683297251 is an apocalyptic number.

66683297251 is a deficient number, since it is larger than the sum of its proper divisors (1).

66683297251 is an equidigital number, since it uses as much as digits as its factorization.

66683297251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The spelling of 66683297251 in words is "sixty-six billion, six hundred eighty-three million, two hundred ninety-seven thousand, two hundred fifty-one".