81676706 has 16 divisors (see below), whose sum is σ = 129212160. Its totient is φ = 38614320.

The previous prime is 81676697. The next prime is 81676711. The reversal of 81676706 is 60767618.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 21296 + ... + 24836.

It is an arithmetic number, because the mean of its divisors is an integer number (8075760).

Almost surely, 2^81676706 is an apocalyptic number.

81676706 is a deficient number, since it is larger than the sum of its proper divisors (47535454).

81676706 is a wasteful number, since it uses less digits than its factorization.

81676706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 81676706 is about 9037.5165836639. The cubic root of 81676706 is about 433.8764434108.

The spelling of 81676706 in words is "eighty-one million, six hundred seventy-six thousand, seven hundred six".