71689066 has 16 divisors (see below), whose sum is σ = 109479744. Its totient is φ = 35200224.

The previous prime is 71689063. The next prime is 71689067. The reversal of 71689066 is 66098617.

It is not an unprimeable number, because it can be changed into a prime (71689063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37465 + ... + 39331.

It is an arithmetic number, because the mean of its divisors is an integer number (6842484).

Almost surely, 2^71689066 is an apocalyptic number.

71689066 is a deficient number, since it is larger than the sum of its proper divisors (37790678).

71689066 is a wasteful number, since it uses less digits than its factorization.

71689066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 71689066 is about 8466.9395887770. The cubic root of 71689066 is about 415.4170404870.

The spelling of 71689066 in words is "seventy-one million, six hundred eighty-nine thousand, sixty-six".