81466808 has 32 divisors (see below), whose sum is σ = 155290800. Its totient is φ = 40061952.

The previous prime is 81466799. The next prime is 81466831. The reversal of 81466808 is 80866418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214763 + ... + 215141.

Almost surely, 2^81466808 is an apocalyptic number.

It is an amenable number.

81466808 is a deficient number, since it is larger than the sum of its proper divisors (73823992).

81466808 is a wasteful number, since it uses less digits than its factorization.

81466808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 81466808 is about 9025.8965205679. The cubic root of 81466808 is about 433.5044568062.

The spelling of 81466808 in words is "eighty-one million, four hundred sixty-six thousand, eight hundred eight".