64669745527 has 2 divisors, whose sum is σ = 64669745528. Its totient is φ = 64669745526.

The previous prime is 64669745489. The next prime is 64669745593. The reversal of 64669745527 is 72554796646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64669745527 - 2³⁵ = 30310007159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64669743527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32334872763 + 32334872764.

It is an arithmetic number, because the mean of its divisors is an integer number (32334872764).

Almost surely, 2^64669745527 is an apocalyptic number.

64669745527 is a deficient number, since it is larger than the sum of its proper divisors (1).

64669745527 is an equidigital number, since it uses as much as digits as its factorization.

64669745527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76204800, while the sum is 61.

It can be divided in two parts, 646697 and 45527, that added together give a square (692224 = 832²).

The spelling of 64669745527 in words is "sixty-four billion, six hundred sixty-nine million, seven hundred forty-five thousand, five hundred twenty-seven".