81167675 has 6 divisors (see below), whose sum is σ = 100647948. Its totient is φ = 64934120.

The previous prime is 81167663. The next prime is 81167683. The reversal of 81167675 is 57676118.

It is not a de Polignac number, because 81167675 - 2¹⁶ = 81102139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1623329 + ... + 1623378.

It is an arithmetic number, because the mean of its divisors is an integer number (16774658).

Almost surely, 2^81167675 is an apocalyptic number.

81167675 is a deficient number, since it is larger than the sum of its proper divisors (19480273).

81167675 is a wasteful number, since it uses less digits than its factorization.

81167675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246717 (or 3246712 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 81167675 is about 9009.3104619610. The cubic root of 81167675 is about 432.9732198838.

It can be divided in two parts, 811 and 67675, that added together give a palindrome (68486).

The spelling of 81167675 in words is "eighty-one million, one hundred sixty-seven thousand, six hundred seventy-five".