80978668 has 6 divisors (see below), whose sum is σ = 141712676. Its totient is φ = 40489332.

The previous prime is 80978663. The next prime is 80978671. The reversal of 80978668 is 86687908.

It is not an unprimeable number, because it can be changed into a prime (80978663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122330 + ... + 10122337.

Almost surely, 2^80978668 is an apocalyptic number.

It is an amenable number.

80978668 is a deficient number, since it is larger than the sum of its proper divisors (60734008).

80978668 is a wasteful number, since it uses less digits than its factorization.

80978668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244671 (or 20244669 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 80978668 is about 8998.8148108515. The cubic root of 80978668 is about 432.6368849576.

The spelling of 80978668 in words is "eighty million, nine hundred seventy-eight thousand, six hundred sixty-eight".