66327072085531 has 16 divisors (see below), whose sum is σ = 68633667889920. Its totient is φ = 64031034101760.

The previous prime is 66327072085471. The next prime is 66327072085559. The reversal of 66327072085531 is 13558027072366.

66327072085531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66327072085531 - 2⁷ = 66327072085403 is a prime.

It is a super-2 number, since 2×66327072085531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66327072085031) 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 15 ways as a sum of consecutive naturals, for example, 32346351 + ... + 34335703.

It is an arithmetic number, because the mean of its divisors is an integer number (4289604243120).

Almost surely, 2^{66327072085531} is an apocalyptic number.

66327072085531 is a deficient number, since it is larger than the sum of its proper divisors (2306595804389).

66327072085531 is a wasteful number, since it uses less digits than its factorization.

66327072085531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992006.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 66327072085531 in words is "sixty-six trillion, three hundred twenty-seven billion, seventy-two million, eighty-five thousand, five hundred thirty-one".