81674078 has 8 divisors (see below), whose sum is σ = 123188520. Its totient is φ = 40611240.

The previous prime is 81674077. The next prime is 81674093. The reversal of 81674078 is 87047618.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 112448 + ... + 113171.

It is an arithmetic number, because the mean of its divisors is an integer number (15398565).

Almost surely, 2^81674078 is an apocalyptic number.

81674078 is a deficient number, since it is larger than the sum of its proper divisors (41514442).

81674078 is a wasteful number, since it uses less digits than its factorization.

81674078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225802.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 81674078 is about 9037.3711885703. The cubic root of 81674078 is about 433.8717899440.

The spelling of 81674078 in words is "eighty-one million, six hundred seventy-four thousand, seventy-eight".