66325314491 has 2 divisors, whose sum is σ = 66325314492. Its totient is φ = 66325314490.

The previous prime is 66325314467. The next prime is 66325314499. The reversal of 66325314491 is 19441352366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66325314491 - 2⁶ = 66325314427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66325314499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33162657245 + 33162657246.

It is an arithmetic number, because the mean of its divisors is an integer number (33162657246).

Almost surely, 2^66325314491 is an apocalyptic number.

66325314491 is a deficient number, since it is larger than the sum of its proper divisors (1).

66325314491 is an equidigital number, since it uses as much as digits as its factorization.

66325314491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The spelling of 66325314491 in words is "sixty-six billion, three hundred twenty-five million, three hundred fourteen thousand, four hundred ninety-one".