81527267352066 has 16 divisors (see below), whose sum is σ = 163054821533184. Its totient is φ = 27175707979184.

The previous prime is 81527267352061. The next prime is 81527267352071. The reversal of 81527267352066 is 66025376272518.

It is an interprime number because it is at equal distance from previous prime (81527267352061) and next prime (81527267352071).

It is not an unprimeable number, because it can be changed into a prime (81527267352061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8163810 + ... + 15155933.

It is an arithmetic number, because the mean of its divisors is an integer number (10190926345824).

Almost surely, 2^{81527267352066} is an apocalyptic number.

81527267352066 is an abundant number, since it is smaller than the sum of its proper divisors (81527554181118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81527267352066 is a wasteful number, since it uses less digits than its factorization.

81527267352066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23902425.

The product of its (nonzero) digits is 50803200, while the sum is 60.

The spelling of 81527267352066 in words is "eighty-one trillion, five hundred twenty-seven billion, two hundred sixty-seven million, three hundred fifty-two thousand, sixty-six".