81146676 has 48 divisors (see below), whose sum is σ = 208666304. Its totient is φ = 24385536.

The previous prime is 81146647. The next prime is 81146683. The reversal of 81146676 is 67664118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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, 660 + ... + 12756.

Almost surely, 2^81146676 is an apocalyptic number.

81146676 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81146676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104333152).

81146676 is an abundant number, since it is smaller than the sum of its proper divisors (127519628).

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

81146676 is a wasteful number, since it uses less digits than its factorization.

81146676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12160 (or 12158 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 81146676 is about 9008.1449810713. The cubic root of 81146676 is about 432.9358782992.

The spelling of 81146676 in words is "eighty-one million, one hundred forty-six thousand, six hundred seventy-six".