81682606 has 16 divisors (see below), whose sum is σ = 126077616. Its totient is φ = 39661056.

The previous prime is 81682597. The next prime is 81682607. The reversal of 81682606 is 60628618.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81682607) 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, 66510 + ... + 67726.

It is an arithmetic number, because the mean of its divisors is an integer number (7879851).

Almost surely, 2^81682606 is an apocalyptic number.

81682606 is a deficient number, since it is larger than the sum of its proper divisors (44395010).

81682606 is a wasteful number, since it uses less digits than its factorization.

81682606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 81682606 is about 9037.8429948744. The cubic root of 81682606 is about 433.8868903281.

The spelling of 81682606 in words is "eighty-one million, six hundred eighty-two thousand, six hundred six".