81674722 has 8 divisors (see below), whose sum is σ = 122663772. Its totient is φ = 40786800.

The previous prime is 81674717. The next prime is 81674729. The reversal of 81674722 is 22747618.

It can be written as a sum of positive squares in 2 ways, for example, as 80084601 + 1590121 = 8949^2 + 1261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81674729) 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 3 ways as a sum of consecutive naturals, for example, 23229 + ... + 26512.

Almost surely, 2^81674722 is an apocalyptic number.

81674722 is a deficient number, since it is larger than the sum of its proper divisors (40989050).

81674722 is a wasteful number, since it uses less digits than its factorization.

81674722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50564.

The product of its digits is 37632, while the sum is 37.

The square root of 81674722 is about 9037.4068183301. The cubic root of 81674722 is about 433.8729303005.

The spelling of 81674722 in words is "eighty-one million, six hundred seventy-four thousand, seven hundred twenty-two".