66526404533 has 4 divisors (see below), whose sum is σ = 69418856928. Its totient is φ = 63633952140.

The previous prime is 66526404493. The next prime is 66526404611. The reversal of 66526404533 is 33540462566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66526404533 - 2⁸ = 66526404277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66526404733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446226163 + ... + 1446226208.

It is an arithmetic number, because the mean of its divisors is an integer number (17354714232).

Almost surely, 2^66526404533 is an apocalyptic number.

It is an amenable number.

66526404533 is a deficient number, since it is larger than the sum of its proper divisors (2892452395).

66526404533 is a wasteful number, since it uses less digits than its factorization.

66526404533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892452394.

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 66526404533 in words is "sixty-six billion, five hundred twenty-six million, four hundred four thousand, five hundred thirty-three".