80857668 has 12 divisors (see below), whose sum is σ = 188667920. Its totient is φ = 26952552.

The previous prime is 80857649. The next prime is 80857709. The reversal of 80857668 is 86675808.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3369058 + ... + 3369081.

Almost surely, 2^80857668 is an apocalyptic number.

It is an amenable number.

80857668 is an abundant number, since it is smaller than the sum of its proper divisors (107810252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80857668 is a wasteful number, since it uses less digits than its factorization.

80857668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738146 (or 6738144 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 80857668 is about 8992.0891899491. The cubic root of 80857668 is about 432.4212925482.

It can be divided in two parts, 8085 and 7668, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 80857668 in words is "eighty million, eight hundred fifty-seven thousand, six hundred sixty-eight".