66225381527 has 2 divisors, whose sum is σ = 66225381528. Its totient is φ = 66225381526.

The previous prime is 66225381503. The next prime is 66225381559. The reversal of 66225381527 is 72518352266.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66225381527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66225381587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33112690763 + 33112690764.

It is an arithmetic number, because the mean of its divisors is an integer number (33112690764).

Almost surely, 2^66225381527 is an apocalyptic number.

66225381527 is a deficient number, since it is larger than the sum of its proper divisors (1).

66225381527 is an equidigital number, since it uses as much as digits as its factorization.

66225381527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 47.

The spelling of 66225381527 in words is "sixty-six billion, two hundred twenty-five million, three hundred eighty-one thousand, five hundred twenty-seven".