66456165527 has 2 divisors, whose sum is σ = 66456165528. Its totient is φ = 66456165526.

The previous prime is 66456165509. The next prime is 66456165539. The reversal of 66456165527 is 72556165466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66456165527 - 2³⁴ = 49276296343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66456165427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33228082763 + 33228082764.

It is an arithmetic number, because the mean of its divisors is an integer number (33228082764).

Almost surely, 2^66456165527 is an apocalyptic number.

66456165527 is a deficient number, since it is larger than the sum of its proper divisors (1).

66456165527 is an equidigital number, since it uses as much as digits as its factorization.

66456165527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 53.

The spelling of 66456165527 in words is "sixty-six billion, four hundred fifty-six million, one hundred sixty-five thousand, five hundred twenty-seven".