81166876341 has 16 divisors (see below), whose sum is σ = 110275378560. Its totient is φ = 53085015360.

The previous prime is 81166876313. The next prime is 81166876367. The reversal of 81166876341 is 14367866118.

It is a happy number.

It is not a de Polignac number, because 81166876341 - 2⁵ = 81166876309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81166826341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2188371 + ... + 2225151.

It is an arithmetic number, because the mean of its divisors is an integer number (6892211160).

Almost surely, 2^81166876341 is an apocalyptic number.

It is an amenable number.

81166876341 is a deficient number, since it is larger than the sum of its proper divisors (29108502219).

81166876341 is a wasteful number, since it uses less digits than its factorization.

81166876341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50716.

The product of its digits is 1161216, while the sum is 51.

The spelling of 81166876341 in words is "eighty-one billion, one hundred sixty-six million, eight hundred seventy-six thousand, three hundred forty-one".