81674075 has 24 divisors (see below), whose sum is σ = 117159168. Its totient is φ = 55320480.

The previous prime is 81674053. The next prime is 81674077. The reversal of 81674075 is 57047618.

It is not a de Polignac number, because 81674075 - 2⁶ = 81674011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81674077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11714 + ... + 17336.

It is an arithmetic number, because the mean of its divisors is an integer number (4881632).

Almost surely, 2^81674075 is an apocalyptic number.

81674075 is a deficient number, since it is larger than the sum of its proper divisors (35485093).

81674075 is a wasteful number, since it uses less digits than its factorization.

81674075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723 (or 5718 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 81674075 is about 9037.3710225928. The cubic root of 81674075 is about 433.8717846318.

The spelling of 81674075 in words is "eighty-one million, six hundred seventy-four thousand, seventy-five".