80081678 has 4 divisors (see below), whose sum is σ = 120122520. Its totient is φ = 40040838.

The previous prime is 80081671. The next prime is 80081717. The reversal of 80081678 is 87618008.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80081671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020418 + ... + 20020421.

It is an arithmetic number, because the mean of its divisors is an integer number (30030630).

Almost surely, 2^80081678 is an apocalyptic number.

80081678 is a deficient number, since it is larger than the sum of its proper divisors (40040842).

80081678 is a wasteful number, since it uses less digits than its factorization.

80081678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40040841.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 80081678 is about 8948.8366841730. The cubic root of 80081678 is about 431.0335297260.

The spelling of 80081678 in words is "eighty million, eighty-one thousand, six hundred seventy-eight".