81527966 has 12 divisors (see below), whose sum is σ = 132423192. Its totient is φ = 37628136.

The previous prime is 81527959. The next prime is 81527987. The reversal of 81527966 is 66972518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120266 + ... + 120941.

It is an arithmetic number, because the mean of its divisors is an integer number (11035266).

Almost surely, 2^81527966 is an apocalyptic number.

81527966 is a deficient number, since it is larger than the sum of its proper divisors (50895226).

81527966 is a wasteful number, since it uses less digits than its factorization.

81527966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241235 (or 241222 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 81527966 is about 9029.2838032703. The cubic root of 81527966 is about 433.6129084757.

The spelling of 81527966 in words is "eighty-one million, five hundred twenty-seven thousand, nine hundred sixty-six".