66521463145011 has 12 divisors (see below), whose sum is σ = 109813209001392. Its totient is φ = 38012264654256.

The previous prime is 66521463144977. The next prime is 66521463145013. The reversal of 66521463145011 is 11054136412566.

66521463145011 is a `hidden beast` number, since 6 + 6 + 5 + 2 + 1 + 4 + 631 + 4 + 5 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 66521463145011 - 2¹³ = 66521463136819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66521463145013) 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 in 11 ways as a sum of consecutive naturals, for example, 527948120136 + ... + 527948120261.

It is an arithmetic number, because the mean of its divisors is an integer number (9151100750116).

Almost surely, 2^{66521463145011} is an apocalyptic number.

66521463145011 is a deficient number, since it is larger than the sum of its proper divisors (43291745856381).

66521463145011 is a wasteful number, since it uses less digits than its factorization.

66521463145011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055896240410 (or 1055896240407 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

Adding to 66521463145011 its reverse (11054136412566), we get a palindrome (77575599557577).

The spelling of 66521463145011 in words is "sixty-six trillion, five hundred twenty-one billion, four hundred sixty-three million, one hundred forty-five thousand, eleven".