81482866 has 32 divisors (see below), whose sum is σ = 131258880. Its totient is φ = 37867200.

The previous prime is 81482857. The next prime is 81482873. The reversal of 81482866 is 66828418.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193336 + ... + 193756.

It is an arithmetic number, because the mean of its divisors is an integer number (4101840).

Almost surely, 2^81482866 is an apocalyptic number.

81482866 is a deficient number, since it is larger than the sum of its proper divisors (49776014).

81482866 is a wasteful number, since it uses less digits than its factorization.

81482866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570.

The product of its digits is 147456, while the sum is 43.

The square root of 81482866 is about 9026.7860282606. The cubic root of 81482866 is about 433.5329377603.

The spelling of 81482866 in words is "eighty-one million, four hundred eighty-two thousand, eight hundred sixty-six".