81740676 has 48 divisors (see below), whose sum is σ = 203696640. Its totient is φ = 25455360.

The previous prime is 81740651. The next prime is 81740677. The reversal of 81740676 is 67604718.

It is a super-2 number, since 2×81740676² = 13363076225873952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81740677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7000 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (4243680).

Almost surely, 2^81740676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81740676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101848320).

81740676 is an abundant number, since it is smaller than the sum of its proper divisors (121955964).

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

81740676 is a wasteful number, since it uses less digits than its factorization.

81740676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7644 (or 7642 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 81740676 is about 9041.0550269313. The cubic root of 81740676 is about 433.9896859519.

The spelling of 81740676 in words is "eighty-one million, seven hundred forty thousand, six hundred seventy-six".