81466760 has 32 divisors (see below), whose sum is σ = 189216000. Its totient is φ = 31535040.

The previous prime is 81466757. The next prime is 81466769. The reversal of 81466760 is 6766418.

It is not an unprimeable number, because it can be changed into a prime (81466769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31610 + ... + 34089.

It is an arithmetic number, because the mean of its divisors is an integer number (5913000).

Almost surely, 2^81466760 is an apocalyptic number.

It is an amenable number.

81466760 is an abundant number, since it is smaller than the sum of its proper divisors (107749240).

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

81466760 is a wasteful number, since it uses less digits than its factorization.

81466760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65741 (or 65737 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 81466760 is about 9025.8938615519. The cubic root of 81466760 is about 433.5043716664.

The spelling of 81466760 in words is "eighty-one million, four hundred sixty-six thousand, seven hundred sixty".